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.

 

[pb2007]

The distribution of carbonate within dental enamel follows the same surface to dentinoenamel junction patterns as which of the following?

A-Lead
B-Calcium
C-Fluoride
D-Strontium
E- None of the above

PLease explain

is it choice B

 

[Cindrella]

is it choice B

The answer given by ASDA is "none of the above " .. but i didn't understand the question only 😳 ... can someone pls explain !

 

[bratdoc]

Answer is None of these
Because a specific pattern of deposition is followed by enamel matrix. and during its calcification it is only calcium which will follow the same pattern... Not carbonate

 

[teethie]

agree👍

Answer is None of these
Because a specific pattern of deposition is followed by enamel matrix. and during its calcification it is only calcium which will follow the same pattern... Not carbonate

 

[teethie]

hi pb2007, thank u for pointing it out, i missed reading the word avoidance.

you are rite teethie diuretics help getting rid of edema but choice mentions avoidance of diuretics so we r left with last choice .

 

[teethie]

please help.

1) peripheral nerve tissue consist of all except
axons
cell bodies
fibroblasts

2) When a baby takes his first breath, the pressure increases where?
Ductus arterosus----- it closes after birth but is it that pressure increases here???
ductus venosus
right auricle
right atrium
left atrium

3) Which of the following is intracellular pathogen?
Histomycosis, actinomycosis and candida

4) Where is the lamina propria and the periosteum practically a single membrane? Buccal mucosa, soft palate, floor of mouth, attached gingiva

5) A dentist loses a tooth, where should he not look for it?
Vallecula, piriform recess, pharyngeal recess?

6) What stimulates the ectoderm to turn into neural crest

 

[bratdoc]

please help.

1) peripheral nerve tissue consist of all except
axons
cell bodies
fibroblasts--- ANSWER

2) When a baby takes his first breath, the pressure increases where?
Ductus arterosus----- it closes after birth but is it that pressure increases here???
ductus venosus
right auricle
right atrium
left atrium---- ANSWER- Because before birth the foramen ovale is open due to increased Right atrium pressure during systole... with the first breath the pressure is reversed and left atrium pressure rises greater than right during systole to close the foramen ovale... permanent closure takes time

3) Which of the following is intracellular pathogen?
Histomycosis,---ANSWER (Macrophages...only if it is the same as histoplasmosis) actinomycosis and candida

4) Where is the lamina propria and the periosteum practically a single membrane? Buccal mucosa, soft palate, floor of mouth, attached gingiva--- Answer(not sure)

5) A dentist loses a tooth, where should he not look for it?
Vallecula, piriform recess, pharyngeal recess---ANSWER-- COZ lodgement always takes place in either the vallecula or pyriform recess!?

6) What stimulates the ectoderm to turn into neural crest
http://en.wikipedia.org/wiki/Neural_crest#Inductive_signals though i dont think they will go into this detail... or will they?? What is the source of this question?

What is the source of these questions?

Oh n yeah do correct me if I am wrong!

 

[asheer]

diff bw the maxillary and mandibular premolar ! the mandibular premlr hav wat

1 hav lingual cusps less developed

2 hav crown stilted to the facial ===== ans 😕😕😕 hw isnt this lingual

 

[bratdoc]

diff bw the maxillary and mandibular premolar ! the mandibular premlr hav wat

1 hav lingual cusps less developed

2 hav crown stilted to the facial ===== ans 😕😕😕 hw isnt this lingual

u sure about this answer??? where is it from... i also agree with ur point!

 

[teethie]

bratdoc, thanks for the answers.
n-seriesmistakes are there.
@asheer: it is definitely tilted to lingual not facial.

u sure about this answer??? where is it from... i also agree with ur point!

 

[elmos]

what's the difference between inferior vena cava and the portal vein

 

[butterfly22]

Muscle glycogen phosphorylase is activated by: (a) epinephrine; (b) glucagon; (c) insulin.

1-(a) only ..ASDA's answer
2-(a) and (b) ... My answer 🙂
3-(a) and (c)
4-(b) only
5-(b) and (c)
6-(c) only
7-All of the above

pls explain

the answer should be (a). refer to deck no101 (physio) , it sayz dat glucagon does not stimulate glycogen degradation in muscles

 

[butterfly22]

diff bw the maxillary and mandibular premolar ! the mandibular premlr hav wat

1 hav lingual cusps less developed

2 hav crown stilted to the facial ===== ans 😕😕😕 hw isnt this lingual

even the first choice seems right...mandi premolars hav less developed lingual cusps...?🙁

 

[teethie]

are u asking about histologic difference or what??

what's the difference between inferior vena cava and the portal vein

 

[asheer]

one last thing we hav already discussed this but just wanted to confirm


its frm the N series : the basal plate develops into the =motor neuron
the alar plate dev into the ====sensory axon 😕😕

 

[Cindrella]

the answer should be (a). refer to deck no101 (physio) , it sayz dat glucagon does not stimulate glycogen degradation in muscles

check NBDE part 1 first aid -- Page 277 ... it says both Glucagon and epinephrine stimulate glycogenolysis and Insulin promotes glycolysis 😕

 

[Cindrella]

one last thing we hav already discussed this but just wanted to confirm


its frm the N series : the basal plate develops into the =motor neuron
the alar plate dev into the ====sensory axon 😕😕

Alar plate --> Posterior i.e Sensory Afferent Dorsal
Basal plate --> Anterior i.e Motor Efferent Ventral

Please correct me if i am wrong !

 

[Cindrella]

diff bw the maxillary and mandibular premolar ! the mandibular premlr hav wat

1 hav lingual cusps less developed

2 hav crown stilted to the facial ===== ans 😕😕😕 hw isnt this lingual

yeah even i read this somewhere... is it decks ?!

 

[teethie]

yes, you got this absolutely right.

one last thing we hav already discussed this but just wanted to confirm


its frm the N series : the basal plate develops into the =motor neuron
the alar plate dev into the ====sensory axon 😕😕

 

[teethie]

no it is from N-series released exam.

yeah even i read this somewhere... is it decks ?!

 

[teethie]

@cindrella: which year of asda paper is your muscle glycogen question from? can you please tell?

 

[butterfly22]

check NBDE part 1 first aid -- Page 277 ... it says both Glucagon and epinephrine stimulate glycogenolysis and Insulin promotes glycolysis 😕

datz right Cindrella..glucagon promotes glygogenolysis but in liver and not in muscles..here the ques asks about muscle glycogen...and in muscles epinephrine does the same.
i've heard biochem lectures and evn they say d same...and moreovr it is highlighted as an important point in the decks..

 

[bratdoc]

Guys i know this might be a silly question... but heregoes

The resistance of a newborn child to Whooping cough is due to:

A. Natural Active Immunity
B. Natural Passive Immunity
C. Acquired Active immunity
D. Acquired passive Immunity
E. Active-Passive immunity


Can some answer and also explain why?

 

[butterfly22]

Guys i know this might be a silly question... but heregoes

The resistance of a newborn child to Whooping cough is due to:

A. Natural Active Immunity
B. Natural Passive Immunity
C. Acquired Active immunity
D. Acquired passive Immunity
E. Active-Passive immunity


Can some answer and also explain why?

i think the answer is (B) Natural passive immunity.
At the time of birth the child has IgG antibody which is acquired 4m the mother thru placenta, and when the child breast feeds he acquires IgA 4m the colostrum. Newborn's germ-fighting system begins making its own antibodies when the child is 2-3 months old and till dan he is protected by pasive immunity..
correct me if wrong..

 

[bratdoc]

i think the answer is (B) Natural passive immunity.
At the time of birth the child has IgG antibody which is acquired 4m the mother thru placenta, and when the child breast feeds he acquires IgA 4m the colostrum. Newborn's germ-fighting system begins making its own antibodies when the child is 2-3 months old and till dan he is protected by pasive immunity..
correct me if wrong..

Thanks Butterfly22
But what about DPT vaccine then???

 

[bratdoc]

What is the allergen usually responsible for contact hypersensitivity??
Hapten
Protein

Im confused!!! In one paper i read that the answer was Hapten in the other i found out it was protein!!! WHAT is it?!

 

[butterfly22]

Thanks Butterfly22
But what about DPT vaccine then???

but the question does not says dat the child was vaccinated..coz in dat case the ans will be aritifical acquired active immunity..right???

where did u read this question?

 

[butterfly22]

What is the allergen usually responsible for contact hypersensitivity??
Hapten
Protein

Im confused!!! In one paper i read that the answer was Hapten in the other i found out it was protein!!! WHAT is it?!

well Haptens are the allergens responsible for hypersenstivity and they can cause hypersenstivity only if the are carried by a carrier proteins.
plz correct if i'm wrong..

 

[bratdoc]

but the question does not says dat the child was vaccinated..coz in dat case the ans will be aritifical acquired active immunity..right???

where did u read this question?

Thanks... yea in case of immunization it will be artificial active... I read it in one of the ASDA released papers ... cant really recall which one! maybe G-J?!

 

[Cindrella]

The pH of a solution having a 10-5 M concentration of OH- ion is

A-5.
B-7
C-9.
D-determinable only if the pKa is known.
E-determinable only if the base composition is known.

can someone pls explain how to solve such questions 🙁😕

please explain this

 

[Cindrella]

@cindrella: which year of asda paper is your muscle glycogen question from? can you please tell?

Its from 87 or 89 cuz i was solving those 2 papers at that time. Its hard to find the question again... hope this helps...

 

[drdds3]

what do you find in x-ray of osteomyelitis patient?
a. cortical bone loss
b. woven bone resorption
c. interlaminar cell loss

difference between cortical and woven bone
a. increase in collagen
b. increase in hydroxyapetitie
c. increase in cells

 

[Cindrella]

🙁🙁🙁 Page 408 of first aid says -- When glucagon , epinephrine and PTH activate cAMP --> there is increased glycolysis and gluconeogenesis....

is it true or am i getting messed up with my facts ?! pls help

 

[butterfly22]

please explain this

i think the answer should be (e).
PH=[H-]+[OH+]
plz correct me if i'm wrong..

 

[butterfly22]

what do you find in x-ray of osteomyelitis patient?
a. cortical bone loss(answer)
b. woven bone resorption
c. interlaminar cell loss

difference between cortical and woven bone
a. increase in collagen
b. increase in hydroxyapetitie
c. increase in cell (answer)http://www.thebonejournal.com/article/S8756-3282(04)00294-7/abstract

Woven bone has been estimated to contain four to eight times more osteocytes than lamellar bone.

plz correct me if i'm wrong

 

[teethie]

But question is about cortical bone differing with woven bone not with lamellar bone.
Is not cortical bone and lamellar bone two different things😕😕
READ THIS:
http://books.google.ca/books?id=1BG...PA289#v=onepage&q=woven bone cortical&f=false

http://www.thebonejournal.com/article/S8756-3282(04)00294-7/abstract[/URL]

Woven bone has been estimated to contain four to eight times more osteocytes than lamellar bone.

plz correct me if i'm wrong

 

[teethie]

agree 👍

datz right Cindrella..glucagon promotes glycogenolysis but in liver and not in muscles..here the ques asks about muscle glycogen...and in muscles epinephrine does the same.
i've heard biochem lectures and evn they say d same...and moreovr it is highlighted as an important point in the decks..

 

[Cindrella]

i think the answer should be (e).
PH=[H-]+[OH+]
plz correct me if i'm wrong..

ASDA says it 9.... but i don't understand how...

 

[butterfly22]

But question is about cortical bone differing with woven bone not with lamellar bone.
Is not cortical bone and lamellar bone two different things😕😕
READ THIS:
http://books.google.ca/books?id=1BG...PA289#v=onepage&q=woven bone cortical&f=false

i'm really confused about this.....i thought lamellar bone is a type of cortical bone...😕😕

 

[butterfly22]

ASDA says it 9.... but i don't understand how...

question belongs to which series?

 

[Cindrella]

question belongs to which series?

from year 87 or 89 !!

 

[teethie]

kW IS IONIC PRODUCT OF HYDROGEN ION AND HYDOXYL ION WHICH IS 1x10 raise to the power -14
hence Kw=-14 log 10
Kw= (H+)(OH-)
-14LOG10= (H+)(-5LOG10)

(H)+=14-5=9

please explain this

Originally Posted by Cindrella
The pH of a solution having a 10-5 M concentration of OH- ion is

A-5.
B-7
C-9.
D-determinable only if the pKa is known.
E-determinable only if the base composition is known.

can someone pls explain how to solve such questions 🙁😕

 

[drdds3]

Thanks for ur answers butterfly22.
So now what is the answer??

i'm really confused about this.....i thought lamellar bone is a type of cortical bone...😕😕

 

[teethie]

@ elmos:
some time back you posted one question about pepsin activity. do you know what question it was?
btw pepesinogen converts into pepsin when come into contact with HCl.

 

[teethie]

drdds3 , r u sure of this question wording?

difference between cortical and woven bone
a. increase in collagen
b. increase in hydroxyapetitie
c. increase in cells

 

[drdds3]

Action of cyclein in cell cycle
a. tumor suppressor
b. DNA tumor expression
c. cysteine kinase

what type of necrosis associated with cl. perfringes?
(options are the types of necrosis)

what type of necrosis seen in alcoholic patients?

 

[wdent]

Action of cyclein in cell cycle
a. tumor suppressor.............answer !
b. DNA tumor expression
c. cysteine kinase

what type of necrosis associated with cl. perfringes?--Gangrenous causing puterfaction whichi foul smelling !
(options are the types of necrosis)

what type of necrosis seen in alcoholic patients?

--Fat(soap) Necrosis

Pls correct iam wrong !

 

[drdds3]

Hi teethie,

A very good explanation.

whether in this case--- the canine guidance shift to anterior teeth??

to all my sdnfriends, i am putting a concept here and hope this solves confusion.
first of all be clear what a canine protected oclusion is.
whenever there is canine guidance, that is vertical overlap of canines then there will be no posterior teeth contact on either working and non working side. if there are any contacts on either side,then it is an interference. so if a canine is missing on working side, there will be no overlap of canines on working side, and no disocclusion of posterior teeth on working as well as non working side will happen. this will cause wearing of post. teeth and then we say that it is not a canine protected occlusion.

in group function, we are only saying that teeth contact on working side now it does not matter which teeth are missing on that side because it leads to occlusal contact only on working side not on non working side.

correct if wrong or any confusion is there, let me know.

 

[drdds3]

yes i am

drdds3 , r u sure of this question wording?

 

[teethie]

hi drdds3, i never read anything like that so my answer is no it wont shift to lateral or central incisor.

if anyone knows, please correct me.

Hi teethie,

A very good explanation.

whether in this case--- the canine guidance shift to anterior teeth??