Questions!

[dentgod]

---

Members do not see this ad.

what is the sinus thats located below the sella turcica?

everything wud cause bleeding except?
increased systolic bld pressure
hypokalemia
cigarette smoking
decreased thrombaxane

if the pt is given the 115mg per ml of inulin, when the plasma concn of inulin is 0.1 mg/ml, whats the gfr?
115 mg/ml
0.1mg/ml

anybody pls state the ans with the explanation. thank you

 

[pbkal]

Ans is endothelial cell damage.

thanks for correcting the ans.

 

[dentgod]

what the largest cusp of the primary mandibular first molar?
mesiobuccal says the decks, but the wheelars pg no 93 says the mesiolingual. pls fix the doubt. thank you

 

[Hammered]

what the largest cusp of the primary mandibular first molar?
mesiobuccal says the decks, but the wheelars pg no 93 says the mesiolingual. pls fix the doubt. thank you

According to the new decks....its the mesiobuccal cusp.

 

[briansle]

anyone knows answers to these..

Pure Guesses

1.Large dark areas in the ground section of dentin due to
sclerotic dentin
dead tracts
unmineralised dentin
2.maximum convexity in a mesiodistal direction for which tooth
max central
max lateral
man central
man lateral
3.primary mandibular lateral is identical to which tooth?
perm max central
perm mand central
prim mand central
4.which of the following is least important in the inactivation of virus by physical/chemical methods
nature of nucleic acid
presence of capsule
amount of virus in saliva
amount of virus in blood
5.outer root sheath of hair follicle forms from which epithelial layer
st.basale
st.granulosum
st.corneum
st.granulosum
6.which is normal in the oral cavity of an aging adult?
increased nonprismatic enamel
downward movement of epithelial attachment
7.which of the following reaction do not require NADPH ?
fatty acid synthesis
steroid synthesis
formation of glucose from pyruvate
formation of rna from dna
8.Which cell rest on the basement membrane of seminiferous tubule?
primary spermatocytes
secondary spermatocyte
spermatogonia
9.oral bacteria in normal gingival sulcus
gram negative cocci
gram positive cocci and filaments
gram positive rods and spirochates
10.position of upper margin of gingiva related to the crest of alveolar bone
above 2-4mm alveolar bone
above 4-6mm alveolar bone
if i am missing any choices plz forgive..

i dunno

 

[dentgod]

some more questions pls resolve them. Long time huh!
For a reaction catalyzed by an enzyme with a Km=1mM, which of the following represents the effect on the velocity if is changed from 10 mM to 20 mM ? The equation obeys the michealis- menton equation

Small decrease
small increase- answer is B
twofold decrease
twofold increase
twentyfold increase
Pls explain this.
IN aqueous solution at pH 7, a peptide containing 1 amino group side chain and 2 carboxyl group side chains would have which of the following net charges?
2+
1+
0
1- answer
2-
Pls explain the concepts. thank you.

 

[dentgod]

tetrodoxin blocks which of the following in the nerve-axon membrane?
sodium
calcium
hydrogen
chloride
potassium

hyperventilation induce apnea by lowering the
-arterial tension of CO2 below the threshold
-arterial tension of o2 below the threshold
-inspiratory capacity
-vital capacity
tidal volume

an analysis of EKG shows P- waves occuring in the S-T segment. This would indicate the ectopic beats originating in the
- atria
-AV node
lower portion of the bundle of His
upper portion of the bundle of his

each of the following polymers is paired with the component precursor except
dextran- sucrose
glycogen- fructose
mutan- sucrose
levan -sucrose
glycogen-UDP glucose

 

[pb2007]

tetrodoxin blocks which of the following in the nerve-axon membrane?
sodium
calcium
hydrogen
chloride
potassium

hyperventilation induce apnea by lowering the
-arterial tension of CO2 below the threshold
-arterial tension of o2 below the threshold
-inspiratory capacity
-vital capacity
tidal volume

an analysis of EKG shows P- waves occuring in the S-T segment. This would indicate the ectopic beats originating in the
- atria
-AV node
lower portion of the bundle of His
upper portion of the bundle of his

each of the following polymers is paired with the component precursor except
dextran- sucrose
glycogen- fructose
mutan- sucrose
levan -sucrose
glycogen-UDP glucose

1.....sodium...http://en.wikipedia.org/wiki/Tetrodotoxin#Biochemistry
2......arterial tension of co2 below threshold http://en.wikipedia.org/wiki/Apnea
3.........??????
4.....glycogen ..fructose
plz correct if wrong

 

[pbkal]

tetrodoxin blocks which of the following in the nerve-axon membrane?
sodium-answer
calcium
hydrogen
chloride
potassium

hyperventilation induce apnea by lowering the
-arterial tension of CO2 below the threshold-answer(not sure)
-arterial tension of o2 below the threshold
-inspiratory capacity
-vital capacity
tidal volume

an analysis of EKG shows P- waves occuring in the S-T segment. This would indicate the ectopic beats originating in the
- atria-answer
-AV node
lower portion of the bundle of His
upper portion of the bundle of his

each of the following polymers is paired with the component precursor except
dextran- sucrose
glycogen- fructose-answer
mutan- sucrose
levan -sucrose
glycogen-UDP glucose

pls correct the wromng ones...

 

[pb2007]

can sumone plz explain how hydrostatic pressure in bowman's capsule ,plasma colloid osmotic pressure ,afferent n efferent arteriols affect th glomerular filtration rate .according to decks vasodilation of afferent ,vasocontriction of efferent,decreased hydrostatic pressure in bowman's capsule n decreased plasma colloid osmotic pressure increase the gfr .i dont understand th basic concept behind this

 

[briansle]

some more questions pls resolve them. Long time huh!
For a reaction catalyzed by an enzyme with a Km=1mM, which of the following represents the effect on the velocity if is changed from 10 mM to 20 mM ? The equation obeys the michealis- menton equation


M&M equation is

v0 = (vmax(S))/(km+(S)). I tried solving for v0 and compared the two v0 values for substrate conc at 10 an 20mM.
Plug in the values. Make up a value for vmax say 1. If you compared the v0 u will see a small increase.

Small decrease
small increase- answer is B
twofold decrease
twofold increase
twentyfold increase
Pls explain this.
IN aqueous solution at pH 7, a peptide containing 1 amino group side chain and 2 carboxyl group side chains would have which of the following net charges?
2+
1+
0
1- answer
2-


amino side chain is +1 carboxyl side chain is -1. so its -2 +1 in a neutral pH thus overall -1
Pls explain the concepts. thank you.

not sure about the m7M equation one though

 

[briansle]

an analysis of EKG shows P- waves occuring in the S-T segment. This would indicate the ectopic beats originating in the
- atria-answer
-AV node
lower portion of the bundle of His
upper portion of the bundle of his

Can someone explain why the answ is atria?

I'm assuming that patient is undergoing some kind of tachycardia and firing off p-waves before the ventricles have enough time to repolarize completely? So the action potential is still occuring from the atria, just at a more rapid rate?

 

[dentgod]

thank you pbkal, pb2007, brainsle. My concept for the ekg question is s-t segment is when the ventricles are completely depolarized n isoelectric and the P wave is the atrial depolarization. Means, the SA node should be fine as brainsle said.So, the pathology shouldn't be in the AV node?

 

[lk1984]

i posted this in a separate thread but no answers 😳

1- rete pegs are found in the oral mucosa but not on the free ginigiva or sulucular epithelium and the junctional epi. unless it's inflamed?

2- in the dental anatomy part: are there pictures of real teeth that we are asked to identify?

3- which is the shortest papilla; between the mandibular 2nd premolar and 1st premolar or that between the 1st and 2nd mandibular molars?

4- also, in patho card # 252 states that 75% o myasthema gravis patients have abnormal thymus such as thyoma. card 216 that 1% of patients present with a thyoma! checked my medical dictionary it says some, while in the myasthenia graves book (from Google) the percentage was 15% .. which one is correct?

 

[iomega]

Hii Ik1984,
4- also, in patho card # 252 states that 75% o myasthema gravis patients have abnormal thymus such as thyoma. card 216 that 1% of patients present with a thyoma! checked my medical dictionary it says some, while in the myasthenia graves book (from Google) the percentage was 15% .. which one is correct?


wht i understood is tht 75% of myasthenia gravis patients might have thymoma( ie not all of them)...n thymoma accures in only 1% of the population( tht 1% includes myasthenia gravis pts)..i hope u get it.

 

[dentgod]

hey ik84,
there was no picture questions in my testing. I took it in June 09 and no movement with pics or identification of mesial view or blab..blab. Prepare with an idea( maybe not too much effort) that way you wud get hurt. Hope this wud help you.

 

[lk1984]

iomega: ummm could be ,, but I'm pretty sure that both cards mentioned the incident of thyoma in MG patients not the population. i think I would go with the book result I found ..

dentgod: thanks a lot yes it helped ,

 

[dentgod]

Hello folks, Pls do work this questions out and pls try not to skip the explanation.
1.A mouth rinse contains 0.05% F-( fluoride). Which of the following represents the concentration expressed as PPM fluoride?
5
50
500-ans
5000
Some one please explain
2. For which is the first group of the which following pairs more likely to be located on the surface of a globular protein than the second group of the pair?
-CONH2 -COO-
-CH3 -CH(CH3)2
-CH2OH -NH4+
-CH3 -CH2OH:answer
-CH2SH -COO-

No idea how, pls explain.
which of the following hormones can cause increased concentration of serum calcium ions?
FSH
Prolactin
calcitonin
CCK
1,25- dihydroxycholecalciferol-answer
I wonder how and why not calcitonin. Pls explain.

 

[pb2007]

Hello folks, Pls do work this questions out and pls try not to skip the explanation.
1.A mouth rinse contains 0.05% F-( fluoride). Which of the following represents the concentration expressed as PPM fluoride?
5
50
500-ans
5000
Some one please explain
2. For which is the first group of the which following pairs more likely to be located on the surface of a globular protein than the second group of the pair?
-CONH2 -COO-
-CH3 -CH(CH3)2
-CH2OH -NH4+
-CH3 -CH2OH:answer
-CH2SH -COO-

No idea how, pls explain.
which of the following hormones can cause increased concentration of serum calcium ions?
FSH
Prolactin
calcitonin
CCK
1,25- dihydroxycholecalciferol-answer
I wonder how and why not calcitonin. Pls explain.

precursor of adrenomedullin.
[edit] Physiology

The hormone participates in calcium (Ca2+) and phosphorus metabolism. In many ways, calcitonin counteracts parathyroid hormone (PTH).
To be specific, calcitonin affects blood Ca2+ levels in three ways:

• Inhibits Ca2+ absorption by the intestines[5]
• Inhibits osteoclast activity in bones[6]
• Inhibits phosphate reabsorption by the kidney tubules[7]
• Increases absolute Ca2+ and Mg+ reabsorption by the kidney tubules, calcitonin is a renal Ca-conserving hormone.[7]

Secretion of calcitonin is stimulated by:

• an increase in serum [Ca2+][8]
• gastrin and pentagastrin.[9]

[edit] Actions

Its actions, in a broad sense, are:

• Bone mineral metabolism:

- Protect against Ca2+ loss from skeleton during periods of Ca2+ stress such as pregnancy and lactation

• Serum calcium level regulation

- Prevent postprandial hypercalcemia resulting from absorption of Ca2+ from foods during a meal- Vitamin D regulation

• A satiety hormone:

- Inhibit food intake in rats and monkeys- May have CNS action involving the regulation of feeding and appetitehttp://en.wikipedia.org/wiki/Calcitonin#Physiology

 

[dentgod]

pb2007,
thank you! you are rt and I was completely outta mind to get confused. If the choices had parathyroid hormone, it wud be the choice, since calcitonin does the antagonistic function, then it wud not be the choice. u opened my eyes, thanks. some more explanations folks for the rest!

 

[iomega]

1.A mouth rinse contains 0.05% F-( fluoride). Which of the following represents the concentration expressed as PPM fluoride?
5
50
500-ans
5000

concentration of fluoride is 0.05% ..n they r asking for cont of F in PPM(parts per million)
its a simple calculation..
0.05x1000000/100= 500.

 

[wadent]

hey need help here !!! IMPORTANT😎

1. Transmission of sound wave from tympanic memb. to cochlea is done by:
a.nerve fiber
b.auditory ossicles. ( answer )
c.passagethrough a fluid filled comparment
d.hair cells

2.reduced blood flow can cause hypertension by whic of the followin :

a. release of renin. ( answer)
b.reflex vasoconstriction
c.increased output of epinephrine.

3.single impulse travel down an alfa motor axon result in ?

a.activation of a single motor
b.contraction of 1 muscle fiber (answer)
c.contaction of all muscle
d.muscle action potential without contraction

 

[wadent]

hey need help here !!! IMPORTANT😎

1. Transmission of sound wave from tympanic memb. to cochlea is done by:
a.nerve fiber
b.auditory ossicles. ( answer )
c.passagethrough a fluid filled comparment
d.hair cells

2.reduced blood flow can cause hypertension by whic of the followin :

a. release of renin. ( answer)
b.reflex vasoconstriction
c.increased output of epinephrine.

3.single impulse travel down an alfa motor axon result in ?

a.activation of a single motor
b.contraction of 1 muscle fiber (answer)
c.contaction of all muscle
d.muscle action potential without contraction


please correct me if iam wrong !!!!

 

[BENNY4567]

can u pls tell if ques is like conc of fluoride 0.05 mg and its calculation in ppm. And also wy to divide it with 100 in 0.05% conc., i feel its easy but little confused if u could expalin pls.

1.A mouth rinse contains 0.05% F-( fluoride). Which of the following represents the concentration expressed as PPM fluoride?
5
50
500-ans
5000

concentration of fluoride is 0.05% ..n they r asking for cont of F in PPM(parts per million)
its a simple calculation..
0.05x1000000/100= 500.

 

[Psiquis]

Part per million = 1/1000 000

They are talking about percent and part per millions, so first of all we need to make an equivalence.
So, we have:

1 000 000 is to ---- 100%
as x is to-----------0.05%

Now we have an easy one:
(0.05 x 1000 000)/100
(50000)/100
=500
that's the answer for sure.

can u pls tell if ques is like conc of fluoride 0.05 mg and its calculation in ppm. And also wy to divide it with 100 in 0.05% conc., i feel its easy but little confused if u could expalin pls.

 

[dentgod]

hey need help here !!! IMPORTANT😎

1. Transmission of sound wave from tympanic memb. to cochlea is done by:
a.nerve fiber
b.auditory ossicles. ( answer )
c.passagethrough a fluid filled comparment
d.hair cells

2.reduced blood flow can cause hypertension by whic of the followin :

a. release of renin. ( answer)
b.reflex vasoconstriction
c.increased output of epinephrine.

3.single impulse travel down an alfa motor axon result in ?

a.activation of a single motor
b.contraction of 1 muscle fiber (answer)
c.contaction of all muscle
d.muscle action potential without contraction


please correct me if iam wrong !!!!

hey wadent,
the answer to the questions 1 n 2 are rt. But for the 3, i think the choice A is the rt one I guess. Becoz the option read as activation of single motor unit. Correct me if needed. Someone if sure abt choice B pls come forward with the explanation.

 

[dentgod]

thank you iomega n psiquis! that was a good one! lookin forward to post more.

 

[wadent]

hey wadent,
the answer to the questions 1 n 2 are rt. But for the 3, i think the choice A is the rt one I guess. Becoz the option read as activation of single motor unit. Correct me if needed. Someone if sure abt choice B pls come forward with the explanation.

thanks dentgod for clearing the doubt,,,..ill post some more later on ..
thanks buddy👍

 

[wadent]

thanks dentgod for clearing the doubt,,,..ill post some more later on ..
thanks buddy👍

1. coupled respiration requires each of the following except one?
a.adp
b. oxygen (answer)
c. co2

2.atropine prevents the secretion of saliva resulting from stimulation of chorda tympani because :
a. denature the salivary gland protein.
b. prevent action of acetylcholine on secretin cells (answer)
c prevent release of acetylcholine by parasympathetic post. ganglionic fibers.

3.wich of the following organs secrete insulin-like growth factor 1 (igf-1)
and what stimulates this receptor???????
a. ant. pitutary increasin igf-rh in the blood
b. ant. pitutary increasin grh in the blood
c. liver increasing grwoth hormone in the blood (answer)

4.an action potential @ the midpoint along the lenght of an axon will:
a. not propogate.
b. propogate toward the nreve ending (not sure??!!)
c. propogate towards the soma and the nerve endin.

5.juxtaglomerular and cortical nephrons differ primarly in :
a .filtration fraction (answer)
b. location of macula densa
c.length of the thin segment of loop of henle

6.which of the following BEST describes SALIVA ????????????????
a. phosphate is the main ph buffer
b. supplies sialate for additional mucins
c. main source of enzyme for protein digestion
d. supplies calcium and phosphate for remenarilization
e. undersaturated with respect to hydroxyapetite @ neutral PH

7.wich of the followin substance is related by blood platlet and causes to stick 2gether?
a. thrombin (answer)
b. fibrinogen
c. thromboxane A2.

8.which of the following enzymes seals NICKS in DNA ???
a.ligase.
b.exonuclease
c.DNA polymerase (answer )

9.Each of the followin occurs durin prolonged starvation EXCEPT one :
a.ketoacidoses develop progressivly
b. primary fuel is glucagon (answer )

10.cushin syndrom is charecterize by which of the followin condidtion EXCEPT one :
a. increased protein anabolism (answer)
b.hyperkalemia
c. hypertension.

11. a slight detachment of the retina results in a decrease of lenght from the optical center and the subject therefore exhibits :
a. near sightedness (answer)
b. far sightedness
c. nystagmus.

12.Cortisol stimulates synthesis of the liver of ?
a. glucokinase (answer )
b. phosphofructokinase
c. pyruvate carboxylase

13. which main product of protein nitrogen metabolis is found in human urine??
a. urea (answer)
b. ammonia.
c. uric acid
d.creatine

14.As bloood flows through the periodontal memb. tremendous pr. occur in response to forcful occlusion.blood flow is temporarly reduced BUT platlets do not aggregate because of the presence of :

a. ca.
b. adp
c. plamin (answer)
d. thromboxane
e. prostacycline..

GUYS PLEASE CORRECT ME IF IAM WRONG !!!!! what do u think???🙄 lookin to hear from u pls !!

 

[dentgod]

hey wadent,
4.an action potential @ the midpoint along the lenght of an axon will:
a. not propogate.
b. propogate toward the nreve ending
c. propogate towards the soma and the nerve ending-answer

5.juxtaglomerular and cortical nephrons differ primarly in :
a .filtration fraction
b. location of macula densa
c.length of the thin segment of loop of henle-answer

7.which of the followin substance is related by blood platlet and causes to stick 2gether?
a. thrombin
b. fibrinogen
c. thromboxane A2.(answer)
I made few corrections on the answers, feel free to correct me if needed.

 

[wadent]

hey wadent,
4.an action potential @ the midpoint along the lenght of an axon will:
a. not propogate.
b. propogate toward the nreve ending
c. propogate towards the soma and the nerve ending-answer

5.juxtaglomerular and cortical nephrons differ primarly in :
a .filtration fraction
b. location of macula densa
c.length of the thin segment of loop of henle-answer

7.which of the followin substance is related by blood platlet and causes to stick 2gether?
a. thrombin
b. fibrinogen
c. thromboxane A2.(answer)
I made few corrections on the answers, feel free to correct me if needed.

hey dentgod,,thanks 4 da reply !!! what about the others r they correct?? what about question number 6??

 

[pb2007]

1. coupled respiration requires each of the following except one?

c. co2...........................answer
6.which of the following BEST describes SALIVA ????????????????
a. phosphate is the main ph buffer
b. supplies sialate for additional mucins
c. main source of enzyme for protein digestion
d. supplies calcium and phosphate for remenarilization.......................answer
e. undersaturated with respect to hydroxyapetite @ neutral PH
14.As bloood flows through the periodontal memb. tremendous pr. occur in response to forcful occlusion.blood flow is temporarly reduced BUT platlets do not aggregate because of the presence of :

a. ca.
b. adp
c. plamin
d. thromboxane
e. prostacycline..........answer

 

[wadent]

1. coupled respiration requires each of the following except one?

c. co2...........................answer
6.which of the following BEST describes SALIVA ????????????????
a. phosphate is the main ph buffer
b. supplies sialate for additional mucins
c. main source of enzyme for protein digestion
d. supplies calcium and phosphate for remenarilization.......................answer
e. undersaturated with respect to hydroxyapetite @ neutral PH
14.As bloood flows through the periodontal memb. tremendous pr. occur in response to forcful occlusion.blood flow is temporarly reduced BUT platlets do not aggregate because of the presence of :

a. ca.
b. adp
c. plamin
d. thromboxane
e. prostacycline..........answer

hey question number 14 . why its prostacyclin ? and not plasmin for example(bec. its a proteolytic enzyme that dissolve fibrin of blood clots)

 

[BENNY4567]

Thanx psiquis

Part per million = 1/1000 000

They are talking about percent and part per millions, so first of all we need to make an equivalence.
So, we have:

1 000 000 is to ---- 100%
as x is to-----------0.05%

Now we have an easy one:
(0.05 x 1000 000)/100
(50000)/100
=500
that's the answer for sure.

 

[pbkal]

8.which of the following enzymes seals NICKS in DNA ???
a.ligase.
b.exonuclease
c.DNA polymerase (answer )

ans is (a).

 

[pbkal]

10.cushin syndrom is charecterize by which of the followin condidtion EXCEPT one :
a. increased protein anabolism (answer)
b.hyperkalemia
c. hypertension

ans is hyperkalemia.

4.an action potential @ the midpoint along the lenght of an axon will:
a. not propogate.
b. propogate toward the nreve ending (not sure??!!)
c. propogate towards the soma and the nerve endin.

i think ans is (c).

12.Cortisol stimulates synthesis of the liver of ?
a. glucokinase (answer )
b. phosphofructokinase
c. pyruvate carboxylase

i think ans should be (c).pls correct if im wrong.....

 

[dentgod]

10.cushin syndrom is charecterize by which of the followin condidtion EXCEPT one :
a. increased protein anabolism (answer)
b.hyperkalemia
c. hypertension

ans is hyperkalemia.

4.an action potential @ the midpoint along the lenght of an axon will:
a. not propogate.
b. propogate toward the nreve ending (not sure??!!)
c. propogate towards the soma and the nerve endin.

i think ans is (c).

12.Cortisol stimulates synthesis of the liver of ?
a. glucokinase (answer )
b. phosphofructokinase
c. pyruvate carboxylase

i think ans should be (c).pls correct if im wrong.....

hey pbkal,
even i think the answer for the ques 14 is c. can u pls explain the answers hyperkalemia n glucokinase. thanks in advance.

 

[dentgod]

hey question number 14 . why its prostacyclin ? and not plasmin for example(bec. its a proteolytic enzyme that dissolve fibrin of blood clots)
Hey wadent,
why not plasmin becoz, when in the presence of bld clot, the kidney secretes the substance called plasminogen, which is converted to plasmin that acts on the clot to dissolve it. But the prostacyclin is the substance that's synthesized from the endothelial cell membrane (arachidonic acid) by the cyclooxygenase pathway. Its functions are as follows:
-antagonizes platelet aggregation
-potent vasodilator of coronary arteries.
-major prostaglandin.
refer kaplan pg 340. correct me if i'm wrong.

 

[pbkal]

hey dentgod
explanation for choosing hypokalemia -



Under rare conditions, glucocorticoids function as mineralocorticoids, causing hypokalemia and hypertension. Glucocorticoids, such as cortisol, have a high affinity for the mineralocorticoid receptor but are normally prevented from binding to it because the enzyme 11beta-hydroxysteroid dehydrogenase (11beta-HSDH) converts cortisol to cortisone, which does not bind to the mineralocorticoid receptor. Some drugs, such as glycerrhetinic acid (found in carbenoxolone, chewing tobacco, and licorice), inhibit 11beta-HSDH, allowing cortisol to exert mineralocorticoid-like effects in the distal nephron. Infrequently, circulating cortisol can exceed the metabolic capacity of 11beta-HSDH and cause hypokalemia. This can occur either in severe cases of Cushing’s disease or in the ectopic ACTH syndrome.


regarding pyruvate carboxylase,my thinking was-
pyruvate carboxylase is an enzyme involved in gluconeogenesis.(increases glucose levels)
glucokinase is an enzyme involved in glycolysis(metabolism of glucose).


hope im clear.pls correct if im wrong anywhere.

 

[wadent]

10.cushin syndrom is charecterize by which of the followin condidtion EXCEPT one :
a. increased protein anabolism (answer)
b.hyperkalemia
c. hypertension

ans is hyperkalemia.

4.an action potential @ the midpoint along the lenght of an axon will:
a. not propogate.
b. propogate toward the nreve ending (not sure??!!)
c. propogate towards the soma and the nerve endin.

i think ans is (c).

12.Cortisol stimulates synthesis of the liver of ?
a. glucokinase (answer )
b. phosphofructokinase
c. pyruvate carboxylase

i think ans should be (c).pls correct if im wrong.....

hey thanks 4 the reply r u sure about quest. number 12 !!!

 

[dentgod]

hey dentgod
explanation for choosing hypokalemia -



Under rare conditions, glucocorticoids function as mineralocorticoids, causing hypokalemia and hypertension. Glucocorticoids, such as cortisol, have a high affinity for the mineralocorticoid receptor but are normally prevented from binding to it because the enzyme 11beta-hydroxysteroid dehydrogenase (11beta-HSDH) converts cortisol to cortisone, which does not bind to the mineralocorticoid receptor. Some drugs, such as glycerrhetinic acid (found in carbenoxolone, chewing tobacco, and licorice), inhibit 11beta-HSDH, allowing cortisol to exert mineralocorticoid-like effects in the distal nephron. Infrequently, circulating cortisol can exceed the metabolic capacity of 11beta-HSDH and cause hypokalemia. This can occur either in severe cases of Cushing’s disease or in the ectopic ACTH syndrome.


regarding pyruvate carboxylase,my thinking was-
pyruvate carboxylase is an enzyme involved in gluconeogenesis.(increases glucose levels)
glucokinase is an enzyme involved in glycolysis(metabolism of glucose).


hope im clear.pls correct if im wrong anywhere.

thanks pbkal!
if i'm not mistaken, your answer choice was hyperkalemia n explanation is for hypokalemia. which one do I have to go with? can u tell me pls.

 

[pbkal]

thanks pbkal!
if i'm not mistaken, your answer choice was hyperkalemia n explanation is for hypokalemia. which one do I have to go with? can u tell me pls.

10.cushin syndrom is charecterize by which of the followin condidtion EXCEPT one :
a. increased protein anabolism (answer)
b.hyperkalemia
c. hypertension

the question says which is NOT a feature of cushings syndrome.and the ans is hyperkalemia.
i gave the explanation saying that cushing syndrome causes hypokalemia.
i hope im clear this time....

 

[pbkal]

hey thanks 4 the reply r u sure about quest. number 12 !!!

im positive with pyruvate carboxylase.

 

[pb2007]

greater petrosal nerve contains which of th following components
a]sympathetic fibres
b]general viseral afferent fibres
c]general somatic efferent
d]parasympathetic fibres
e]special viseral efferent fibres
answer is choice B and D.its frm anatomy exm 1982,ques 18th ,can sumone plz expain why b is th choice coz according to kaplan notes its general viseral efferent fibres.
plz help.

 

[wadent]

well ,,i will chose d... bec. its from facial n. of pterygoid canal ..
let me put it this way pb2007 : pterygopalatine supplies lacrimal gland in the palate by PARASYMPATHETIC root of ( greater petrosal nerve)

hope this helps !!!!!



ok can some one here clear this question :
It says which of the following base pairs promote helix stabilization in DNA but NOT
in RNA ???????????
a. G-C
b. A-T
c. G-U
OK here we go lot of people here on sdn chose answer b ,,,, my question is can someone out there explain why its A-T ???? because ill chose answer a because of great 3 H bond between C-G.
SO IS THE ANSWER a ????????? because i know that A-T is used in transcription to aid in the release of newly formed RNA from DNA

lookin fro ur reply ...
take care
wa-dent

 

[pbkal]

well ,,i will chose d... bec. its from facial n. of pterygoid canal ..
let me put it this way pb2007 : pterygopalatine supplies lacrimal gland in the palate by PARASYMPATHETIC root of ( greater petrosal nerve)

hope this helps !!!!!



ok can some one here clear this question :
It says which of the following base pairs promote helix stabilization in DNA but NOT
in RNA ???????????
a. G-C
b. A-T
c. G-U
OK here we go lot of people here on sdn chose answer b ,,,, my question is can someone out there explain why its A-T ???? because ill chose answer a because of great 3 H bond between C-G.
SO IS THE ANSWER a ????????? because i know that A-T is used in transcription to aid in the release of newly formed RNA from DNA

lookin fro ur reply ...
take care
wa-dent

purines in DNA-adenine and guanine
purines in RNA-same as above

pyrimidines in DNA-thymine and cytosine
" RNA-uracil and "

G-C bonding is present in both DNA and RNA.
the questions asks base pair not present in RNA.in RNA,A-U base pairs r present.in DNA,A-T is present.
thymine is not present in RNA.present only in DNA,hence the answer.
hope im clear.

 

[mathew1919]

well ,,i will chose d... bec. its from facial n. of pterygoid canal ..
let me put it this way pb2007 : pterygopalatine supplies lacrimal gland in the palate by PARASYMPATHETIC root of ( greater petrosal nerve)

hope this helps !!!!!



ok can some one here clear this question :
It says which of the following base pairs promote helix stabilization in DNA but NOT
in RNA ???????????
a. G-C
b. A-T
c. G-U
OK here we go lot of people here on sdn chose answer b ,,,, my question is can someone out there explain why its A-T ???? because ill chose answer a because of great 3 H bond between C-G.
SO IS THE ANSWER a ????????? because i know that A-T is used in transcription to aid in the release of newly formed RNA from DNA

lookin fro ur reply ...
take care
wa-dent

Adenine would base pair with Thymine and Guanine with Cytosine.In RNA,however,thymine is replaced by Uracil

 

[pb2007]

well ,,i will chose d... bec. its from facial n. of pterygoid canal ..
let me put it this way pb2007 : pterygopalatine supplies lacrimal gland in the palate by PARASYMPATHETIC root of ( greater petrosal nerve)

hope this helps !!!!!



ok can some one here clear this question :
It says which of the following base pairs promote helix stabilization in DNA but NOT
in RNA ???????????
a. G-C
b. A-T
c. G-U
OK here we go lot of people here on sdn chose answer b ,,,, my question is can someone out there explain why its A-T ???? because ill chose answer a because of great 3 H bond between C-G.
SO IS THE ANSWER a ????????? because i know that A-T is used in transcription to aid in the release of newly formed RNA from DNA

lookin fro ur reply ...
take care
wa-dent

pyrimidines are CUT[cytosine,thymine,uracil]
purines AG,
uracil found only in RNA while thymine only in DNA,

SO IN rna th pairing should be G -C and A - U while in dna it will be A - T,G -C.so choice b should be the answer.

 

[pb2007]

well ,,i will chose d... bec. its from facial n. of pterygoid canal ..
let me put it this way pb2007 : pterygopalatine supplies lacrimal gland in the palate by PARASYMPATHETIC root of ( greater petrosal nerve)

hope this helps




thnks for th reply wadent bt th prob still remains,i didnt write th complete ques ,i meant both choices D and B r th answers,th answers r asked in pairs,so th confusion is why choice B is th answer given in th key wen kaplan notes say its general viseral efferents .so should i stick to wat ada key says ???????????/

 

[pbkal]

greater petrosal nerve contains which of th following components
a]sympathetic fibres
b]general viseral afferent fibres
c]general somatic efferent
d]parasympathetic fibres
e]special viseral efferent fibres
answer is choice B and D.its frm anatomy exm 1982,ques 18th ,can sumone plz expain why b is th choice coz according to kaplan notes its general viseral efferent fibres.
plz help.

greater petrosal nerve carries gustatory(taste)fibers to the palatal mucosa-general visceral afferent fibers and
parasympathetic fibers.
pls correct if im wrong...

 

[wadent]

pyrimidines are CUT[cytosine,thymine,uracil]
purines AG,
uracil found only in RNA while thymine only in DNA,

SO IN rna th pairing should be G -C and A - U while in dna it will be A - T,G -C.so choice b should be the answer.

hey mathew and pb 2007 ,, i really got now ,,thanks guys 🙄 👍