Let's try again, join me for study group NBDE I may/June 2010

[blissonearth]

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Hi friends, let's continue the closed thread here. No promoting any materials here, just prop some in doubt questions as our exam is approaching fast.

 

[dontist]

I think the answer should be median nasal process:

The palate develop in the 5th week. Three steps: 1. Primary palate formation; 2. Secondary palate; 3. Fusion of primary and secondary.

Primary palate comes from the fusion of two median nasal process (grow medially and downwardly). Primary palate forms the bone enclose the maxillary incisors including the small portion of hard palate just behind the incisor and maxillary bone below the nose.

doesnt palate developed from fusion of premaxilla and palatal shelves???

 

[happyk9]

doesnt palate developed from fusion of premaxilla and palatal shelves???

I studied this from dental decks. I guess premaxilla and palatal shelves are the other names? I don't know. But I would stick to decks.

 

[dontist]

I studied this from dental decks. I guess premaxilla and palatal shelves are the other names? I don't know. But I would stick to decks.

new decks?? which edition??? can u plz tell...

 

[dontist]

cerebellar cortex contains histologically which type of cells?

1. purkinje ???
2. pyramidal
3. horizontal
4. basket ?????
5. Martinotti


according to wiki .. there are 3 layers of cerebellum

The cerebellar cortex is divided into three layers. At the bottom lies the thick granular layer, densely packed with granule cells, along with much smaller numbers of interneurons, mainly Golgi cells. In the middle lies the Purkinje layer, a narrow zone that contains only the cell bodies of Purkinje cells. At the top lies the molecular layer, which contains the flattened dendritic trees of Purkinje cells, along with the huge array of parallel fibers penetrating the Purkinje cell dendritic trees at right angles. This outermost layer of the cerebellar cortex also contains two types of inhibitory interneurons, stellate cells and basket cells. Both stellate and basket cells form GABAergic synapses onto Purkinje cell dendrites.



in the above question.. there is not specifically mentioned in which layer...

i mean middle layer contains purkinje cells and the outermost layers contain basket and setllate cells.

any idea which one to select from option??

 

[happyk9]

new decks?? which edition??? can u plz tell...

Yes, latest one.

 

[dontist]

 

[coucou]

ans.submandibular

otic gives to parotid, pteryopalatine to lacrimal and palatal glands and superior cerival supples to all parasympathetic of head and neck

 

[dontist]

ans.submandibular

otic gives to parotid, pteryopalatine to lacrimal and palatal glands and superior cerival supples to all parasympathetic of head and neck

i agree completely with u.. and infact thts what even i think same...

but the answer is 4. superior cervical ganglion.
any discussion??

or answer key is wrong???😀😀

now its becoming a usual thing.. lol

 

[colours99]

Sub mandibular ganglion is para symp. and Sup cervical ganglion is Symp via ECA.

i agree completely with u.. and infact thts what even i think same...

but the answer is 4. superior cervical ganglion.
any discussion??

or answer key is wrong???😀😀

now its becoming a usual thing.. lol

 

[dontist]

Sub mandibular ganglion is para symp. and Sup cervical ganglion is Symp via ECA.

👍👍👍

i agree.. i was just looking at this thing.. and i found this.. was about to post it.. and saw.. u already said..

thanks colours... keep rocking..

btw when is ur exam??

 

[dontist]

cerebellar cortex contains histologically which type of cells?

1. purkinje ???
2. pyramidal
3. horizontal
4. basket ?????
5. Martinotti


according to wiki .. there are 3 layers of cerebellum

The cerebellar cortex is divided into three layers. At the bottom lies the thick granular layer, densely packed with granule cells, along with much smaller numbers of interneurons, mainly Golgi cells. In the middle lies the Purkinje layer, a narrow zone that contains only the cell bodies of Purkinje cells. At the top lies the molecular layer, which contains the flattened dendritic trees of Purkinje cells, along with the huge array of parallel fibers penetrating the Purkinje cell dendritic trees at right angles. This outermost layer of the cerebellar cortex also contains two types of inhibitory interneurons, stellate cells and basket cells. Both stellate and basket cells form GABAergic synapses onto Purkinje cell dendrites.



in the above question.. there is not specifically mentioned in which layer...

i mean middle layer contains purkinje cells and the outermost layers contain basket and setllate cells.

any idea which one to select from option??

anyone pl give me clarification of my above questtion.. plz

 

[dontist]

 

[wadent]

answer is number (2) for sure 🙂

 

[dontist]

answer is number (2) for sure 🙂

thats becoz i marked it???😀😀😀😀

give me explanation for the same.. 😛😛😛😛

 

[dontist]

isnt it medial lemniscus?? i mean most of the ascending and descending tracts cross over in medial lemniscus????


confused.. pl someone explain....

 

[wadent]

because only cartilage grows by intersitial.

 

[coucou]

i agree completely with u.. and infact thts what even i think same...

but the answer is 4. superior cervical ganglion.
any discussion??

or answer key is wrong???😀😀

now its becoming a usual thing.. lol

i guess so..lol..
when is ur exam?

 

[All ABOUT TEETH]

Hey everyone! I just registered but I've been following the thread for quite some time, it's great!
I'd like to know if anyone has a drawing of the arches and occlusion for DA portion. I heard it's a lot quicker and easier to answer the DA questions during the exam if you have and understand this drawing.......😕

 

[dphvj]

Hey I guess it is purkinje cells.

Cerebellar cortex
The cortex of the cerebellum consists of three very well-defined layers. The most prominent nerve cells are Purkinje cells, whose cell bodies all lie in a discrete layer.

[SIZE=-1][SIZE=-1][/SIZE]The inner granular layer is packed with nuclei of vastly many cerebellar granule cells. These are among the smallest (and most numerous) neurons in the body.[/SIZE]
[SIZE=-1]The Purkinje cell layer contains large cell bodies of Purkinje cells, the sole output cells for the cortex.[/SIZE]
[SIZE=-1][SIZE=-1][SIZE=-1][/SIZE][/SIZE][SIZE=-1][SIZE=-1][SIZE=-1][SIZE=-1][SIZE=-1][/SIZE][/SIZE][/SIZE][/SIZE][/SIZE][SIZE=-1][/SIZE]The outer molecular layer consists principally of the dendrites of Purkinje cells and the axons of granule cells. The odd name "molecular layer" derives from the fine texture of this layer, due to its composition largely of dendrites and fine axon terminals. Nuclei in this layer belong mostly to glial cells.[/SIZE]
​

 

[dphvj]

ans.submandibular

otic gives to parotid, pteryopalatine to lacrimal and palatal glands and superior cerival supples to all parasympathetic of head and neck

The Sympathetic Efferent Fibers of the Facial Nerve are supposed to arise from the small cells of the facial nucleus. According to some authors the fibers to the salivary glands arise from a special nucleus, the superior salivatory nucleus, consisting of cells scattered in the reticular formation, dorso-medial to the facial nucleus. These preganglionic fibers are distributed partly through the chorda tympani and lingual nerves to the submaxillary ganglion where they terminate about the cell bodies of neurons whose axons as postganglionic fibers conduct secretory and vasodilotar impulses to the submaxillary and sublingual glands. Other preganglionic fibers of the facial nerve pass via the great superficial petrosal nerve to the sphenopalatine ganglion where they form synapses with neurons whose postganglionic fibers are distributed with the superior maxillary nerve as vasodilator and secretory fibers to the mucous membrane of the nose, soft palate, tonsils, uvula, roof of the mouth, upper lips and gums, parotid and orbital glands.

 

[papu]

which of the following can induce edema?
a)lymphatic blokage
b)decresed capillary hydrostatic pressure
c)increased plasma oncotic pressure
d)decresed tissue oncotic pressure

i think a is the ans, but d as well plz help

 

[dentist 2010]

answer is a for sure.
Causes of edema:
1.increased hydrostatic pressure
2.reduced oncotic pressure in blood vessels
3.increase in blood vessel wall permeability
4.obstruction of lymphatics
5.changes in water retaining properties of the tissues.

 

[papu]

answer is a for sure.
Causes of edema:
1.increased hydrostatic pressure
2.reduced oncotic pressure in blood vessels
3.increase in blood vessel wall permeability
4.obstruction of lymphatics
5.changes in water retaining properties of the tissues.

thank u dentist 2010, for reconfirming the ans

 

[dentist 2010]

thank u dentist 2010, for reconfirming the ans

u r welcome!🙂

 

[doit22]

hi all

can any one tell me whether nbde first aid part 1 book 2007 edition and 2008 edition has much difference or its almost the same....pls..thanks...

 

[All ABOUT TEETH]

The method that I use to understand the pressure is that the oncotic pressure pulls, like oncotic reminds me of coming on to me "pulling towards me", and hydrostatic is the push, away from me..... so if you say decreased hydrostatic you mean decreased push, so that means its coming on to you instead. If you say decreased oncotic you mean "decreased coming on to me" so its pushing away and viceversa... I hope this helps. It's easier to understand the mechanism than to memorize the causes.

 

[All ABOUT TEETH]

Hey Wadent, are you using any drawings on the DA portion?

 

[All ABOUT TEETH]

An autosomal dominant trait showing 50% penetrance will be phenotypically expressed in what percentage of the offspring?
A. 0
B. 25
C. 33
D. 50
E. 75

THE ANSWER IS B. 25, CAN ANYONE EXPLAIN?????????

 

[asheer]

i did my bds in india and lost a subject in second yr! so am just worried abt my gpa from ece dose that effect the score or admissions please can anybody tell me !!!!!! am very worried abt that!!!!!!!!!!

 

[jalika]

can someone help me understand this?

If molar percentage of A in a native DNA specimen is 22%, then what is the molar content of G?
A. 22%
B. 28%
C. 44%
D. 56%
E. 78%

 

[dental wing]

A=T $G=C If A=22%,then

pirines=pyrimidines

22+22=G+C=100
44+2G=100(because---G=C)
2G=56
G=28%

 

[dontist]

An autosomal dominant trait showing 50% penetrance will be phenotypically expressed in what percentage of the offspring?
A. 0
B. 25
C. 33
D. 50
E. 75

THE ANSWER IS B. 25, CAN ANYONE EXPLAIN?????????

i think there should be percentage of offospring effected or not effected??

50 percent expressed Aa

so say mom has A a
das has A a

possibility in children will be

AA Aa aA aa

so possibility of not effected will be aa - 25%

effected - aA Aa and AA - 75 %

anyone pl correct me if i am in wrong direction.

 

[dontist]

i guess so..lol..
when is ur exam?

next month...🙁🙁🙁🙁🙁

Hey I guess it is purkinje cells.

Cerebellar cortex
The cortex of the cerebellum consists of three very well-defined layers. The most prominent nerve cells are Purkinje cells, whose cell bodies all lie in a discrete layer.

[SIZE=-1]The inner granular layer is packed with nuclei of vastly many cerebellar granule cells. These are among the smallest (and most numerous) neurons in the body.[/SIZE]
[SIZE=-1]The Purkinje cell layer contains large cell bodies of Purkinje cells, the sole output cells for the cortex.[/SIZE]
[SIZE=-1][SIZE=-1][SIZE=-1][SIZE=-1][SIZE=-1][SIZE=-1][/SIZE][/SIZE][/SIZE][/SIZE][/SIZE][SIZE=-1][/SIZE]The outer molecular layer consists principally of the dendrites of Purkinje cells and the axons of granule cells. The odd name "molecular layer" derives from the fine texture of this layer, due to its composition largely of dendrites and fine axon terminals. Nuclei in this layer belong mostly to glial cells.[/SIZE]
​

good one.. from where u quoted this?? source?

 

[blissonearth]

My exam is coming up fast, in less than 2 weeks
Thank you for giving all these questions!

One thing I want to update on the anatomy. I have hard time putting together some textbook and atlas as it is not join together (first aid is great but not as much as pictures to help out with the sentences after sentences). While acland video lectures help, but it really goes fast as far as the Origin and Insertion. It's great for fast review, after you know your material.

I ended up getting a book : Netter, head and neck anatomy for dentistry. Wow, although I just got it yesterday, it's really nice book and it is well worth to study from. It has the theory as well as the netter's anatomy drawings. It started on the embryology, which has lots of questions from. It mentions some diseases related to it to..

Just my 2 cents. I hope it helps.

 

[coucou]

My exam is coming up fast, in less than 2 weeks
Thank you for giving all these questions!

One thing I want to update on the anatomy. I have hard time putting together some textbook and atlas as it is not join together (first aid is great but not as much as pictures to help out with the sentences after sentences). While acland video lectures help, but it really goes fast as far as the Origin and Insertion. It's great for fast review, after you know your material.

I ended up getting a book : Netter, head and neck anatomy for dentistry. Wow, although I just got it yesterday, it's really nice book and it is well worth to study from. It has the theory as well as the netter's anatomy drawings. It started on the embryology, which has lots of questions from. It mentions some diseases related to it to..

Just my 2 cents. I hope it helps.

when is ur exam???mine is on 1st june.i m gettin very low score in antomy?what would u suggest to me?

 

[blissonearth]

If you read my post, this book really helps : netter head and neck anatomy for dentistry, by neil norton. Most of the anatomy is from head and neck, then add the rest on fisrt aid books

when is ur exam???mine is on 1st june.i m gettin very low score in antomy?what would u suggest to me?

 

[coucou]

The Sympathetic Efferent Fibers of the Facial Nerve are supposed to arise from the small cells of the facial nucleus. According to some authors the fibers to the salivary glands arise from a special nucleus, the superior salivatory nucleus, consisting of cells scattered in the reticular formation, dorso-medial to the facial nucleus. These preganglionic fibers are distributed partly through the chorda tympani and lingual nerves to the submaxillary ganglion where they terminate about the cell bodies of neurons whose axons as postganglionic fibers conduct secretory and vasodilotar impulses to the submaxillary and sublingual glands. Other preganglionic fibers of the facial nerve pass via the great superficial petrosal nerve to the sphenopalatine ganglion where they form synapses with neurons whose postganglionic fibers are distributed with the superior maxillary nerve as vasodilator and secretory fibers to the mucous membrane of the nose, soft palate, tonsils, uvula, roof of the mouth, upper lips and gums, parotid and orbital glands.

thanks for explaning.....

 

[dontist]

the original question was

1.A drug has pk of 6.4. At a pH of 7.4,which f the following approx the ration of the unprotonated form to protonated form(D-/HD)?
a. 0
b. .1
c 1
d 10
ans is D
----by doc17

From llw:

Defination of Pka
Pka = -logK =-log(10-6.4)


As per the HENDERSON HASSELBACH EQUATION:
Ph=Pka+log[A]/[HA]
WHERE A IS Neutral form of drug and HA is the positively charged drug.

Ph-pka=log[A]/[HA]
10(7.4-6.4)=[A]/[HA]
10(1)=[A]/[HA]
so ratio of unprotonated to protonated form is 10.

isnt pk is same as Pka? i thought both are same.. and if not how did u got 10 which u subtracted by 6.4???

and about that handerson hasselbach eauation....

i got ur step till "Ph-pka=log[A]/[HA]"

than how did u put those values?? 10(7.4-6.4) can u plz explain it???

thanks .. but i tried many times to understand ur answer but still not able to....😕😕😕😕

 

[doit22]

My exam is coming up fast, in less than 2 weeks
Thank you for giving all these questions!

One thing I want to update on the anatomy. I have hard time putting together some textbook and atlas as it is not join together (first aid is great but not as much as pictures to help out with the sentences after sentences). While acland video lectures help, but it really goes fast as far as the Origin and Insertion. It's great for fast review, after you know your material.

I ended up getting a book : Netter, head and neck anatomy for dentistry. Wow, although I just got it yesterday, it's really nice book and it is well worth to study from. It has the theory as well as the netter's anatomy drawings. It started on the embryology, which has lots of questions from. It mentions some diseases related to it to..

Just my 2 cents. I hope it helps.

hi

regd anatomy whether head and neck,upper limb and abdomen is enough or do we need to look for lower limb and others too....?and whether the origin and insertion for all muscle is needed?or whatz given in kaplan review is enough?
nbde first aid part 1 2007 and 2008 edition are same or they hav lot of differance...any idea in this....thanks...

 

[SFO]

I am finishing my D1 year now and am just curious how long, in general, do ppl spend studying for NBDE part I (how many weeks before you take the exam do you start studying)? Do you take it in July? What happens if you fail, how long do you have to wait to re-take?

My school has classes until mid-june and then we're off till mid-August. It doesn't seem like there's any extra time while school is in session to prep for the exam. I would like to do well on the exam, not just pass.

Thanks.

 

[drdds3]

can anyone answer this Question:

Disinfectant effective against both lipophillic and nonlipophillic organisms ?

Thanks in advance

 

[viplilia]

can anyone answer this Question:

Disinfectant effective against both lipophillic and nonlipophillic organisms ?

Thanks in advance

yes on both, read wiki disinfectant.

 

[godblessus]

when is ur exam???mine is on 1st june.i m gettin very low score in antomy?what would u suggest to me?

HI
Mine too on same date!! How much u r scoring on anatomy? Roughly i am getting around 80- 85 in old papers. Still lot to do.
Good luck!

 

[godblessus]

the original question was

1.A drug has pk of 6.4. At a pH of 7.4,which f the following approx the ration of the unprotonated form to protonated form(D-/HD)?
a. 0
b. .1
c 1
d 10
ans is D
----by doc17



isnt pk is same as Pka? i thought both are same.. and if not how did u got 10 which u subtracted by 6.4???

and about that handerson hasselbach eauation....

i got ur step till "Ph-pka=log[A]/[HA]"

than how did u put those values?? 10(7.4-6.4) can u plz explain it???

thanks .. but i tried many times to understand ur answer but still not able to....😕😕😕😕

I hope this helps!! i am too bad at explaining!
Due to the many orders of magnitude spanned by Ka values, a logarithmic measure of the acid dissociation constant is more commonly used in practice. pKa, which is equal to −log10 Ka, may also be referred to as an acid dissociation constant:
http://en.wikipedia.org/wiki/PKa

 

[All ABOUT TEETH]

Is anyone using a drawing for DA of the occusal table and cusp to be able to answer these questions quicker during the exam, they take a lot of time......

 

[ashi]

plz gide me how to prepare for lower limbs,what should we know about them.

 

[wadent]

nothin

 

[coucou]

hi

regd anatomy whether head and neck,upper limb and abdomen is enough or do we need to look for lower limb and others too....?and whether the origin and insertion for all muscle is needed?or whatz given in kaplan review is enough?
nbde first aid part 1 2007 and 2008 edition are same or they hav lot of differance...any idea in this....thanks...

awesome diagrams and materials

check this out for anatomy
http://home.comcast.net/~wnor/lesson8.htm

 

[coucou]

hi

regd anatomy whether head and neck,upper limb and abdomen is enough or do we need to look for lower limb and others too....?and whether the origin and insertion for all muscle is needed?or whatz given in kaplan review is enough?
nbde first aid part 1 2007 and 2008 edition are same or they hav lot of differance...any idea in this....thanks...

http://home.comcast.net/~wnor/lesson8.htm

try this for antomy diagrams

 

[All ABOUT TEETH]

Coucou, thanks for posting that link, it's great !!! Did you use a diagram or something for DA? I keep asking but nobody responds ......