Lets discuss questions of NBDE 1

[d dimps]

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1). .Which angle does a P Wave makes on ECG?
a). .45 degree
b). .180 degree
c). .0 degree
d). .-45 degree
e). .-180 degree.

2). .What is endogenous cholesterol? Most endogenous cholesterol is converted to?
a). .Glucose
b). .Cholic acid
c). .Steroid
d). .Oxaloacetete
e). .Ketone bodies

3). .Which of the following statement is correct regarding Glioblastoma multiforme?
a). .the tumor is most common before puberty
b). .it is classified as a type of meningioma
c). .it is most common type of Astrocytoma.
d). .Its prognosis is generally more favourablethan Grade 1 astrocytoma.
e). .It is derived from the epithelial lining of ventricles

4). .Which of the following pathological changes is irreversible?
a). .fatty changes in liver cells
b). .karyolysis in myocardial cells
c). .glycogen deposition in hepatocyte nuclei
d). .hydropic vacuolization of renal tubular epithelial cells.

5). .An example of Synergism is the effect of?
a). .insulin and glucagon on blood glucose
b). .estrogen and progesterone on uterine motility
c). .growth hormone and thyroxine on skeletal growth.
d). .Antidiuretic hormone and aldosterone on potassium excretion.

 

[molar9]

when calcium levels are elevated beyound the resorption capacity of the kidneys the excess calcium is excreated in urin. calcium just like glucose has a transport maximum which whn exceeeds leads to excreation in urine.[/quote]
Does that have threshold level.thanks

 

[missiondds]

when calcium levels are elevated beyound the resorption capacity of the kidneys the excess calcium is excreated in urin. calcium just like glucose has a transport maximum which whn exceeeds leads to excreation in urine.

Does that have threshold level.thanks[/QUOTE]


No calcium doesnt have a threshold level.. its resorption is coupled with sodium trnasport system all transport systems are subject to saturation properites.

you need to understand tht the primary defect lies in elevated calcium levels at very high rate... due to PTH ... which is causing what would not normally appear in urine to such extent...

an simple analogy could be if u increase force of water at the begining of water pump.. tht force is going to get dessippated in the form of more water at end of tube.. similarly the kidney is using all its available na coupled channels to resorb calcium(which is in high level in glomerular filtrate.. ) what cannot to resorbed is excreated.---------->hypercalcuria

hope i cleared u r doubt

 

[d dimps]

1)A 4 month pregnant lady had a trauma what possible defects the fetus can have in the head and neck region?

2)Lung lobule consists of?

3)10 weeks pregnant lady had a trauma what possible defects the fetus can have?

 

[god bless]

thankyou all for answering and explaining

Does that have threshold level.thanks

 

[aim high]

1)A 4 month pregnant lady had a trauma what possible defects the fetus can have in the head and neck region?

answer)any teratogenic defects ll effect the fetus in first trimister of pregnancy..i.e first 3 months...since its 4 month and head n neck ll already be developed by 10 weeks there ll not be any defect

2)Lung lobule consists of?

answer) consists of terminal bronchioles and alveoli

3)10 weeks pregnant lady had a trauma what possible defects the fetus can have?

answer)10 weeks is less than 3 months so fetus might show defects in head n neck formation n tooth development.

 

[UDUSA]

Hi,
Can anyone please solve this?
pH of a solution with PKa-4.78, 50ml of 0.1m acetate and 50ml of 1m acetic acid.

 

[d dimps]

1)A 4 month pregnant lady had a trauma what possible defects the fetus can have in the head and neck region?

2)Lung lobule consists of?

3)10 weeks pregnant lady had a trauma what possible defects the fetus can have?

Can anyone explain these questions to me .
thanks

 

[dental material]

Hi,
Can anyone please solve this?
pH of a solution with PKa-4.78, 50ml of 0.1m acetate and 50ml of 1m acetic acid.

is the answer 4.78

 

[aim high]

Hi,
Can anyone please solve this?
pH of a solution with PKa-4.78, 50ml of 0.1m acetate and 50ml of 1m acetic acid.

----is answer PH-5.78..

PH= PKA+LOG [A-]/[HA]

PH=4.78+LOG 0.1/1

=4.78+LOG 0.1
=4.78+1
=5.78

 

[dental material]

----is answer PH-5.78..

PH= PKA+LOG [A-]/[HA]

PH=4.78+LOG 0.1/1

=4.78+LOG 0.1
=4.78 + 10 power -1
=4.78-1 = 3.78

 

[dental material]

1 which type of necrosis is most common in alcoholic?

2 substance for glusyltranferase is-
a sucrose
b glucose
c fructose
i have doubt that substance here means on which it acts or which it carries?

Which of the following structures contains both ascending and descending fibers to and from cerebral cortex?

A. ventral pons
B. pyramidal tracts
C. medial lemniscus
D internal capsule
E medial forebrain bundle

Injury of spinal accessory , while in posterior triangle, will cause paralysis of the

A. platysma
B. trapezius
C.splenius capitus
D. sternocleidomastoid
E. inferior belly of omohyoid

An analysis of an EKG shows P-waves occurring in the S-T segment. This would indicate ectopic beats originating in the
A. atria
B. A-V node
C. Lower portion of the bundle of His
D. Upper portion of the bundle of His

How many nucleotides are needed to code for protein with 150 amino acids?
A. 50
B. 150
C. 300
D. 450
E. 600

 

[aim high]

log 0.1 =10power -1
so 4.78-1= 3.78

thanks for the answer

 

[janujts]

1 which type of necrosis is most common in alcoholic? liquificative

2 substance for glusyltranferase is-
a sucrose ----- answer
b glucose
c fructose
i have doubt that substance here means on which it acts or which it carries?

Which of the following structures contains both ascending and descending fibers to and from cerebral cortex?

A. ventral pons
B. pyramidal tracts
C. medial lemniscus
D internal capsule --- answer
E medial forebrain bundle

Injury of spinal accessory , while in posterior triangle, will cause paralysis of the

A. platysma
B. trapezius ---- answer
C.splenius capitus
D. sternocleidomastoid
E. inferior belly of omohyoid

An analysis of an EKG shows P-waves occurring in the S-T segment. This would indicate ectopic beats originating in the
A. atria ---- answer
B. A-V node
C. Lower portion of the bundle of His
D. Upper portion of the bundle of His

How many nucleotides are needed to code for protein with 150 amino acids?
A. 50
B. 150
C. 300
D. 450
E. 600

 

[UDUSA]

Thankyou 4 the answer aim high.
Though I am convinced by ur explanation, the correct answer choice is given as 3.48!!

 

[morphology]

1 which type of necrosis is most common in alcoholic? liquificative

2 substance for glusyltranferase is-
a sucrose ----- answer
b glucose
c fructose
i have doubt that substance here means on which it acts or which it carries?

Which of the following structures contains both ascending and descending fibers to and from cerebral cortex?

A. ventral pons
B. pyramidal tracts
C. medial lemniscus
D internal capsule --- answer
E medial forebrain bundle

Injury of spinal accessory , while in posterior triangle, will cause paralysis of the

A. platysma
B. trapezius ---- answer
C.splenius capitus
D. sternocleidomastoid
E. inferior belly of omohyoid

An analysis of an EKG shows P-waves occurring in the S-T segment. This would indicate ectopic beats originating in the
A. atria ---- answer
B. A-V node
C. Lower portion of the bundle of His
D. Upper portion of the bundle of His

How many nucleotides are needed to code for protein with 150 amino acids?
A. 50-
B. 150-------answer because 1 code= 1 amino acid, so 150 for 150.(not sure)
C. 300
D. 450
E. 600

hey can u pls tell me from where r u getting all these questions?

 

[UDUSA]

Help please,
1) Which tooth among all 4 premolars has the smallest crown n root length?
2) Which tract goes uncrossed throught the spinal c?

 

[UDUSA]

Doesn't the concentration of 2 solutions play any role? Since one is o.1m and the other1m.

 

[aim high]

Thankyou 4 the answer aim high.
Though I am convinced by ur explanation, the correct answer choice is given as 3.48!!

may be the mistake i did is LOG 0.1 may not be 1...so whatever is the value of LOG 0.1 shud be considered ..then we might get 3.48

 

[UDUSA]

----is answer PH-5.78..

PH= PKA+LOG [A-]/[HA]

PH=4.78+LOG 0.1/1

=4.78+LOG 0.1
=4.78+1
=5.78

Doesn't the concentration of solutions play role since both are different?

 

[UDUSA]

may be the mistake i did is LOG 0.1 may not be 1...so whatever is the value of LOG 0.1 shud be considered ..then we might get 3.48

Hmmm.. still confused!

 

[janujts]

When a dentist is operating on a patient accidentally the bur slips on to the tip of the ventral surface of the tongue. Which of the vein is damaged?

Lung compliance decreases in which of the following cases?
a. Emphysema
b. Age
c. Fibrosis

 

[UDUSA]

may be the mistake i did is LOG 0.1 may not be 1...so whatever is the value of LOG 0.1 shud be considered ..then we might get 3.48

Yes u were right, Log of 0.1 is -1 hence the answer is 3.78(b)ut how about concentration?

 

[morphology]

Help please,
1) Which tooth among all 4 premolars has the smallest crown n root length?
2) Which tract goes uncrossed throught the spinal c?

smallest crown is mandibular 2nd, and root is same for maxillary 1,2, and mandi 1.

 

[morphology]

When a dentist is operating on a patient accidentally the bur slips on to the tip of the ventral surface of the tongue. Which of the vein is damaged?

Lung compliance decreases in which of the following cases?
a. Emphysema
b. Age
c. Fibrosis

fibrosis

 

[aim high]

How many nucleotides are needed to code for protein with 150 amino acids?
A. 50-
B. 150
C. 300
D. 450---answer
E. 600

each amino acid made up of 3 nucleotides ..hence 450

 

[morphology]

How many nucleotides are needed to code for protein with 150 amino acids?
A. 50-
B. 150
C. 300
D. 450---answer
E. 600

each amino acid made up of 3 nucleotides ..hence 450

yes u r right. i thought how many codes are needed
sorry

 

[aim high]

Yes u were right, Log of 0.1 is -1 hence the answer is 3.78(b)ut how about concentration?

i think volume in not considered ,only the amount of ionisation is considered

 

[aim high]

]When a dentist is operating on a patient accidentally the bur slips on to the tip of the ventral surface of the tongue. Which of the vein is damaged?

answer ) deep lingual vein


Lung compliance decreases in which of the following cases?
a. Emphysema
b. Age
c. Fibrosis--Answer ...(agree with morphology)

 

[morphology]

]When a dentist is operating on a patient accidentally the bur slips on to the tip of the ventral surface of the tongue. Which of the vein is damaged?

answer ) deep lingual vein


Lung compliance decreases in which of the following cases?
a. Emphysema
b. Age
c. Fibrosis--Answer ...(agree with morphology)

pls tell me the source of these questions. i am giving this exam third time. i need help.
thanks.

 

[morphology]

pls can any one tell me from where should i practice the questions?

 

[missiondds]

1 which type of necrosis is most common in alcoholic? liquificative

2 substance for glusyltranferase is-
a sucrose ----- answer
b glucose
c fructose
i have doubt that substance here means on which it acts or which it carries?

Which of the following structures contains both ascending and descending fibers to and from cerebral cortex?

A. ventral pons(ANSWER)ascending pathwyas are spinal lemisci/ medial lemisci while descendig are cortospinal tracts.
B. pyramidal tracts
C. medial lemniscus
D internal capsule --- answer
E medial forebrain bundle

Injury of spinal accessory , while in posterior triangle, will cause paralysis of the

A. platysma
B. trapezius ---- answer
C.splenius capitus
D. sternocleidomastoid
E. inferior belly of omohyoid

An analysis of an EKG shows P-waves occurring in the S-T segment. This would indicate ectopic beats originating in the
A. atria ---- answer
B. A-V node
C. Lower portion of the bundle of His(answer) st segment is an isoelectric point where all the ventricular muscles are in complete depolarization, so ectopic beat at this point could mean lower region of heart.
D. Upper portion of the bundle of His

How many nucleotides are needed to code for protein with 150 amino acids?
A. 50
B. 150
C. 300
D. 450
E. 600

about this last question .. whn u read the question carefully u ll understand tht , itis asking about HOW MANY necluotides..

what is a nucleotide? its made up of BASE-SUGAR-PHOSPHATE.

ITS QUESTION ISNT FRAMED PROPERLY COZ, NUCLEOTIDES DO NOT MAKE UP THE TEMPLATE SEQUENCE THT CODE FOR AMINO ACIDS TRANSLATED BY TRNA.

THE TRAN LOOKS AT THE MRNA TEMPLATE WHICH IS PURELY A MESSAGE OF BASES(PURIONES N PYRIMIDINES)

FOR EG: AUGGUAAAAGGGUGGC ETC. THIS MESSAGE WILL BE READ BY TRNA WHICH LL SCVANGE FOR AMINO ACIDS CODINS FOR THE 1ST 3BASES.
EG: AUG: METHIONINE

TRAN GETS METHIONINE N PLACES IT IN RIBOSOME LUMEN---->PEPTIDE BOND.

UNDER NO CIRCUIMSTANCE WOULD NUCLEOTIDE WHICH IS B-S-P sequence involved in coding for aminoacids!!!!

well if the questios asking how many bases pair for a protein having 150 aminoacids ..... thn the answer could be

3 bases code for --->1 AA
therfore 150 Aa will code for 450 BASES. AND NOT NUCLEOTIDE!

 

[dental material]

thanx but about this
1 which type of necrosis is most common in alcoholic? liquificative

2 substance for glusyltranferase is-
a sucrose ----- answer
b glucose
c fructose
i have doubt that substance here means on which it acts or which it carries?

Injury of spinal accessory , while in posterior triangle, will cause paralysis of the

A. platysma
B. trapezius ---- answer
C.splenius capitus
D. sternocleidomastoid
E. inferior belly of omohyoid

 

[morphology]

A)Out of all which one is the major cause of death in USA?
a)Atherosclerosis.
b)myocardial infarction.
c)congestive heart failure.
d)valvular defects.
e)congenital heart diseases.

In the United States, diseases of the heart are the leading cause of death, causing a higher mortality than cancer (malignant neoplasms).[7] Coronary heart disease is responsible for 1 in 5 deaths in the U.S.. Some 7,200,000 men and 6,000,000 women are living with some form of coronary heart disease. 1,200,000 people suffer a (new or recurrent) coronary attack every year, and about 40% of them die as a result of the attack.[8]




Coronary artery disease is a disease of the artery caused by the accumulation of atheromatous plaques within the walls of the arteries that supply the myocardium. Angina pectoris (chest pain) and myocardial infarction (heart attack) are symptoms of and conditions caused by coronary heart disease.
Over 459,000 Americans die of coronary heart disease every year[5]. In the United Kingdom, 101,000 deaths annually are due to coronary heart disease.[6]

 

[d dimps]

1 which type of necrosis is most common in alcoholic? liquificative

2 substance for glusyltranferase is-
a sucrose
b glucose
c fructose
i have doubt that substance here means on which it acts or which it carries?

Which of the following structures contains both ascending and descending fibers to and from cerebral cortex?

A. ventral pons
B. pyramidal tracts
C. medial lemniscus
D internal capsule --- answer
E medial forebrain bundle

Injury of spinal accessory , while in posterior triangle, will cause paralysis of the

A. platysma
B. trapezius ---- answer
C.splenius capitus
D. sternocleidomastoid
E. inferior belly of omohyoid

An analysis of an EKG shows P-waves occurring in the S-T segment. This would indicate ectopic beats originating in the
A. atria ---- answer
B. A-V node
C. Lower portion of the bundle of His
D. Upper portion of the bundle of His

How many nucleotides are needed to code for protein with 150 amino acids?
A. 50
B. 150
C. 300
D. 450
E. 600

1)most common type of necrosis in alcoholic is Fatty necrosis.

2)Glucosyltransferases are a type of Glycosyltransferase which enable the transfer of glucose.

3)The internal capsule is an area of white matter in the brain that separates the caudate nucleus and the thalamus from the lenticular nucleus. The internal capsule contains both ascending and descending axons. It consists of axonal fibres that run between the cerebral cortex and the pyramids of the medulla.


4)The answer to this is Sternocleidomastoid muscle and you can see this in this link.
http://education.yahoo.com/reference/gray/subjects/subject/206

5)the answer is Atria coz if in the Ecg the P wave is prolonged and occur in the ST segment then the ectopic beat is occuring before the SA node pacemaker cells are activated and the explanation is in.
http://www.healthatoz.com/healthato...healthatoz/Atoz/ency/atrial_ectopic_beats.jsp

6)answer is 450.

if I am wrong plz do tell me .

 

[nb candy]

A)Out of all which one is the major cause of death in USA?
a)Atherosclerosis.
b)myocardial infarction.
c)congestive heart failure.
d)valvular defects.
e)congenital heart diseases.

it is atherosclerosis as lot of cheesy and fatty things in diet of people

 

[jimrk120884]

A)Out of all which one is the major cause of death in USA?
a)Atherosclerosis.
b)myocardial infarction.
c)congestive heart failure.
d)valvular defects.
e)congenital heart diseases

ATHEROSCLEROSIS IS THE CORRECT ANSWER...👍

 

[missiondds]

A)Out of all which one is the major cause of death in USA?
a)Atherosclerosis.
b)myocardial infarction.
c)congestive heart failure.
d)valvular defects.
e)congenital heart diseases

ATHEROSCLEROSIS IS THE CORRECT ANSWER...👍

can u explain tht...

artherosclerosis is the intiation process.. which left untreated would develop in to angina n ---->MI. people die due to MI.. most artherosclerotic plaques can be resolved by maintaining active lifestyle n early recignition.
also, artherosclerosis is most common in abdominal arota thn heart so artheroscelroscis is MOS LIKELY TO CAUSE PULMONARY EMBOLISM /EDEMA N HEART SYMPTOMS.

 

[dreamchaser]

can u explain tht...

artherosclerosis is the intiation process.. which left untreated would develop in to angina n ---->MI. people die due to MI.. most artherosclerotic plaques can be resolved by maintaining active lifestyle n early recignition.
also, artherosclerosis is most common in abdominal arota thn heart so artheroscelroscis is MOS LIKELY TO CAUSE PULMONARY EMBOLISM /EDEMA N HEART SYMPTOMS.

as u already said people die due to MI arthrosclorosis is cause of disease not cause of death
peple die due to MI which result in symptoms
athrosclorotic plaque is present in most of people but they never die due to this......
so its ans is MI

 

[UDUSA]

Help please,
Can anyone explain:-
1) The drainage(into which spaces) of periapical abscess from Max n man premolars and molars?
2) Which of the vessels contain the HIGHEST viscosity blood- aorta, pulmonary artery, pulmonary vein,vena cava or vasa recta?

 

[aim high]

1) The drainage(into which spaces) of periapical abscess from Max n man premolars and molars?
ans)deep cervical lymph nodes.(not sure)

2) Which of the vessels contain the HIGHEST viscosity blood- aorta, pulmonary artery, pulmonary vein,vena cava or vasa recta?
ans)vasa recta.

 

[dental material]

sickle cell anemia oxygen carrying capacity is-
1 33%
2 61%
3 75%
478%

 

[missiondds]

Help please,
Can anyone explain:-
1) The drainage(into which spaces) of periapical abscess from Max n man premolars and molars?
2) Which of the vessels contain the HIGHEST viscosity blood- aorta, pulmonary artery, pulmonary vein,vena cava or vasa recta?

mand premolars usually drain into sublingual

max .. i guess in bucall space

 

[UDUSA]

1) The drainage(into which spaces) of periapical abscess from Max n man premolars and molars?
ans)deep cervical lymph nodes.(not sure)

2) Which of the vessels contain the HIGHEST viscosity blood- aorta, pulmonary artery, pulmonary vein,vena cava or vasa recta?
ans)vasa recta.

Vasa recta seems correct(can you please explain if possible)

The drainage Q is related to the possible spaces ex-buccal,submandibular,sublingual, pharyngeal spaces etc...pl explain in terms spaces...

 

[UDUSA]

mand premolars usually drain into sublingual

max .. i guess in bucall space

Thanku.
Do you know the drainage related to the muscle attachments of mylohyoid,buccinator?

Another Q-destn of left spinocerebellar tract at T2 results in loss of positional sense on
1) rt side of body above t2
2)below T2
3)lt side of body above T2
4)below T2

 

[missiondds]

sickle cell anemia oxygen carrying capacity is-
1 33%
2 61%
3 75%(answe)..could be coz hb has 4 binding sites n 4 r filled oxy
whn 3 r filled its deoxy/
478%

75% is the only one which falls in the % hb levels

 

[aim high]

why vasa recta has the highest viscosity of blood?

ans)vasa recta are capillaries from efferent arteriol ,hairpin shaped deep into medulla.this arrangement helps them to act as counter current exchangers and maintain hypertonicity of medulla by not allowing the interstitial fluid into it and maintaining high osmotic gradiant.
func of vasa recta is to provide nutrients,remove waste without washing away the solutes.








The drainage Q is related to the possible spaces ex-buccal,submandibular,sublingual, pharyngeal spaces etc...pl explain in terms spaces...

ans)oh sorry i just over looked the question...
answer may be submandibular spaces.

 

[UDUSA]

Which of the compounds contains (labile)active methly groups?
1)serine
2)creatine
3)methinine
4)s-adenosly methionine
5)5-10,methylene tetrahydrofolate

 

[UDUSA]

Please anyone answer..

The occlusal table of mandibular 1st perm molar usually exhibit-
1)4 triangular ridges
2)5 "
3)3 transverse

Are linguogingival groove and linguogingival fissure one and the same?

 

[UDUSA]

Which of the compounds contains (labile)active methly groups?
1)serine
2)creatine
3)methinine
4)s-adenosly methionine
5)5-10,methylene tetrahydrofolate

Answer--methyl group (CH3) attached to the methionine sulfur atom in SAM is chemically reactive, this allows donation of this group in transmethylation reans.

 

[missiondds]

Please anyone answer..

The occlusal table of mandibular 1st perm molar usually exhibit-
1)4 triangular ridges(answer)
2)5 "
3)3 transverse

Are linguogingival groove and linguogingival fissure one and the same?

b/l triangular ridges of buccal/lingual cusps