Questions 1999 NBDE (Antomy Science)

[mam6701e]

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C

 

[inspiron]

Please could anyone help me to find the answers for this anatomy questions:
I would apreciate it


2.- The intercostal nerves lie in the intercostal space betw wich of th foll:
b.- external and internal intercostals
c.- internal nad innermost intercostals
d.- innermost intercostals and subcostal
e.- external intercostals and transversus thoracis.

Ans:INTERNAL AND INNERMOST INTERCOSTAL MUSCLES.
Innermost intercostals: incomplete layer occupying the middle portion of the intercostal space, lie directly beneath the internal intercostals and run in the same direction.

7.- A surgeon while operated on the anterior abdomen found a muscle that had fibers running ant. and inferiorly. Which one represents ths muscle?
a.- internal oblique
b.- external oblique
c.- transversus
d.- rectus

Ans:EXTERNAL OBLIQUE MUSCLE.

(Flat muscles:
1.External oblique : most superficial muscle, fibers run anterior and inferior ( your hands in outside pockets). The external oblique muscle attaches to the outer surface of the ribs well above costal arch
2.Internal oblique: middle layer of muscle, fibers run at right angles to the external oblique (hands in inside pockets), attaches to the costal arch.
3.Transversus abdominis: most internal muscle, fibers run transversely, attaches inside rib cage above costal arch
4.Rectus:vertical or strap muscle.

8.- Polomerization of molecules into collagen fibrils occurs in the:
a.- ribosomes
b.- lysosomes
c.- extracellular space
d.- RER
e.- SER

Ans:EXTRACELLULAR SPACE.

(Individual collagen polypeptide chains are synthesized on membrane-bound ribosomes and injected into the lumen of the endoplasmic reticulum (ER) as larger precursors, called pro-collagen.After secretion, the fibrillar procollagen molecules are converted to collagen molecules in the extracellular space by the removal of the propeptide segments by specific procollagen peptidases. The propeptides have two major functions. They guide the intracellular formation of the triple-stranded collagen molecules, and they prevent the intracellular formation of large collagen fibrils which would destroy the cell).


13.- which of the foll bones comprises a portion of a wall of the orbit?
a.- vomer
b.- parietal
c.- temporal
d.- zigomatic
e.- pterigoid plate

Ans:ZYGOMATIC BONE

(Superior wall:Frontal bone and lesser wing of spenoid.
Inferior wall:Maxilla,Palatine and Zygomatic bone.
Medial wall:Ethmoid,Frontal,Lacrimal and Spenoid.
Lateral wall:Greater wing of Spenoid and Zygomatic bone).

15.- Which of the foll is characterized by the red spots on the dorsal surface of the tongue?
a.- lymphatic nodules
b.- filliform papillae
c.- foliate papillae
d.- fungiform papillae

Ans:FUNGIFORM.

(1.The filiform papillae: are numerous, rough, and threalike no tastebuds
They are arranged in rows parallel to the sulcusterminalis.
2.The fungiform papillae:are small and mushroom-shaped.
They usually appear are pink or red spots.
3.The vallate (circumvallate) papillae are surrounded by a deep, circular
the walls of which are studded with taste buds.
4.The foliate papillae are small lateral folds of lingual mucosa poorly formed in humans.

The vallate, foliate and most of the fungiform papillae contain taste receptors, which are located in the taste buds).


18.- Which of the foll is a sensory nerve?
a.- thoracodorsal
b.- long thoracic
c. medial pectoral
d.- lower subscapular
e.- medial antebrachial cutaneous

????????????????????????????????????????????????????????????????????

correct me if I'm wrong.

 

[ms77]

Hi Mam..
Answers...

2. c (!)
7. b
8. c
13. d
15. d
18. e (!)

Please correct me if Im wrong..

Also, plz post more Qs..I am willing to discuss...

Thanks..
MS



QUOTE=mam6701e]Please could anyone help me to find the answers for this anatomy questions:
I would apreciate it


2.- The intercostal nerves lie in the intercostal space betw wich of th foll:
b.- external and internal intercostals
c.- internal nad innermost intercostals
d.- innermost intercostals and subcostal
e.- external intercostals and transversus thoracis.



7.- A surgeon while operated on the anterior abdomen found a muscle that had fibers running ant. and inferiorly. Which one represents ths muscle?
a.- internal oblique
b.- external oblique
c.- transversus
d.- rectus



8.- Polomerization of molecules into collagen fibrils occurs in the:
a.- ribosomes
b.- lysosomes
c.- extracellular space
d.- RER
e.- SER



13.- which of the foll bones comprises a portion of a wall of the orbit?
a.- vomer
b.- parietal
c.- temporal
d.- zigomatic
e.- pterigoid plate


15.- Which of the foll is characterized by the red spots on the dorsal surface of the tongue?
a.- lymphatic nodules
b.- filliform papillae
c.- foliate papillae
d.- fungiform papillae



18.- Which of the foll is a sensory nerve?
a.- thoracodorsal
b.- long thoracic
c. medial pectoral
d.- lower subscapular
e.- medial antebrachial cutaneous[/QUOTE]

 

[mam6701e]

????????????????????????????????????????????????????????????????????

correct me if I'm wrong.

Gee, with explanations and everything, this will help me
thanks guys

 

[mam6701e]

Gee, with explanations and everything, this will help me
thanks guys

Thanks inspiron
I found this web that is related with that you were saying about fungiform papillae


http://64.233.179.104/search?q=cach...ae+usually+appear+are+pink+or+red+spots&hl=en

or this other one

www.geocities.com/medinotes/oral_cavity.htm

 

[mekha]

well hows everyones studies goin ?

 

[mam6701e]

well hows everyones studies goin ?

It is hard, but we do not have another chance.
We have to keep going

 

[smilein]

could any one help me solving these?


Q)Which of the following Reflexor is exhibited by the
masseter muscle when the dentist tap on side of face?

A.Stretch
B.Withdrawal
C.Golgitendon
D.Cross extensor



Q)Solution A has pH of 7.0 and Solution B has a pH of 6.0.
Both solutions are of equal volume. Which of the following
statements about Solution A and B is MOSTaccurate?

A. A has 1/10 as many hydrogen ions as B
B. A has 10 times more Hydrogen ions than B
C. A has 7/6 of Hydrogen ion concentration of B
D. A has 6/7 of Hydrogen ion concentration of B



Q) Which of the best describes of strength of cardiac muscle contraction

A. Decreased when extra cellular is increased
B. Increased when extrac cellular is increased
C. Mainly regulated by vagal
D. Uneffected by extra cellular CA


Q) Which of the following is a nucleo tide

A. Urate
B. Uracil
C. Ribose
D. Adenosine
E. Thymidylate


Q) How many necleo tides needed to code for protine with 150 amino acids

A. 50
B. 150
C. 300
D. 450
E. 600


Q) An analysis of ECG shows P waves occuring in ST segment the ectopic beats originating in

A. Atria
B. AV Node
C. Lower portion bundle of his
D. Upper portion bundle of his


Q) Approximate % of total bucco lingual dimension of posterior tooth does
occlusal dimension of table represent

A. 40 to 50
B. 30 to 40
C. 50 to 60
D. 60 to 70
E. 100

Thanq

 

[smilein]

some body plz.ans 😕

 

[bhumika_201]

could any one help me solving these?


Q)Which of the following Reflexor is exhibited by the
masseter muscle when the dentist tap on side of face?

A.Stretch
B.Withdrawal
C.Golgitendon
D.Cross extensor

ans - B

Q)Solution A has pH of 7.0 and Solution B has a pH of 6.0.
Both solutions are of equal volume. Which of the following
statements about Solution A and B is MOSTaccurate?

A. A has 1/10 as many hydrogen ions as B
B. A has 10 times more Hydrogen ions than B
C. A has 7/6 of Hydrogen ion concentration of B
D. A has 6/7 of Hydrogen ion concentration of B

ans - A

Q) Which of the best describes of strength of cardiac muscle contraction

A. Decreased when extra cellular is increased
B. Increased when extrac cellular is increased
C. Mainly regulated by vagal
D. Uneffected by extra cellular CA


Q) Which of the following is a nucleo tide

A. Urate
B. Uracil
C. Ribose
D. Adenosine
E. Thymidylate


Q) How many necleo tides needed to code for protine with 150 amino acids

A. 50
B. 150
C. 300
D. 450
E. 600

ans - D


Q) An analysis of ECG shows P waves occuring in ST segment the ectopic beats originating in

A. Atria
B. AV Node
C. Lower portion bundle of his
D. Upper portion bundle of his

ans - A
Q) Approximate % of total bucco lingual dimension of posterior tooth does
occlusal dimension of table represent

A. 40 to 50
B. 30 to 40
C. 50 to 60
D. 60 to 70
E. 100

ans - C
Thanq

correct me if i m wrong
regards
bhumika

 

[smilein]

correct me if i m wrong
regards
bhumika

bumika,could you tell me how the calculation u made??
plz. give me the reason for ur answ,appreciate ur help

thanqs

 

[vikingglobe]

acute changes in contractility are due to changes in intracellulardynamics of Cc.. More calcium increases the availabilty of cross lik sites to actin, increasng cross linking and force of contraction during systole.
So it looks to me choice B where there is increased extracellular Ca.
As one it reaches the threshol potential it wil open the voltage gated calcium channels which are slow channels.This calcium influx causes the sarcoplasmic reticulum to release calcium intracellular calcium by sequestrin intracellularly. Hence providing enough calcium for contraction.

 

[inspiron]

Q)Which of the following Reflexor is exhibited by the
masseter muscle when the dentist tap on side of face?

A.Stretch
B.Withdrawal
C.Golgitendon
D.Cross extensor

Ans: Stretch reflex

The jaw muscles are stretched by means of a tap to the chin. This stimulus delivers a brief rapid stretch to jaw-closing muscles. As well as stimulating stretch-sensitive muscle spindles in jaw muscles, this stretch is also likely to stimulate the TMJ and skin receptors.

Q)Solution A has pH of 7.0 and Solution B has a pH of 6.0.
Both solutions are of equal volume. Which of the following
statements about Solution A and B is MOSTaccurate?

A. A has 1/10 as many hydrogen ions as B
B. A has 10 times more Hydrogen ions than B
C. A has 7/6 of Hydrogen ion concentration of B
D. A has 6/7 of Hydrogen ion concentration of B

Ans:A
pH = -log[H+], A soln is neutral and has less H+ ions than B soln.
B soln has 10 times more hydrogen ions than soln A.


Q) Which of the best describes of strength of cardiac muscle contraction

A. Decreased when extra cellular is increased
B. Increased when extrac cellular is increased
C. Mainly regulated by vagal
D. Uneffected by extra cellular CA

ans: B Increased when extrac cellular is increased

Once the motor neruon has started an action potential to pass along the membrane of the muscle cell, it causes calcium release from the Sarcoplasmic Reticiulum. Once calcium floods the cytoplasm of the cell it sets off a series of events that leads to the interaction of actin and myosin filaments which drive the contraction.


Q) Which of the following is a nucleo tide

A. Urate
B. Uracil
C. Ribose
D. Adenosine
E. Thymidylate

Ans:***Uracil or *Ribose ??????????????????????
Nucleotide consits of : Nitrogenous base
(adenine, guanine, cytosine, thymine or uracil)
Sugar(deoxy ribose or ribose)
Phosphate group.

Q) How many necleo tides needed to code for protine with 150 amino acids

A. 50
B. 150
C. 300
D. 450
E. 600

Ans😀 450
Nucleotide has 3 codons, so just multiple by 3.

Q) An analysis of ECG shows P waves occuring in ST segment the ectopic beats originating in


A. Atria
B. AV Node
C. Lower portion bundle of his
D. Upper portion bundle of his

Ans: ?????????????
The cause of dysrhythmia is ectopic beats. Ectopic beats are premature heart beats that arise from a site other than the sinus node--commonly from the atria, atrioventricular node, or the ventricle.
Premature ectopic beats that cause an inverted P wave to appear during the ST or T wave are originating in the AV node.

Q) Approximate % of total bucco lingual dimension of posterior tooth does
occlusal dimension of table represent

A. 40 to 50
B. 30 to 40
C. 50 to 60
D. 60 to 70
E. 100
ans: c 50 to 60

Let me know is they r right?

 

[vikingglobe]

uracil is nitrogenous base and adenosine is nucleoside and ribose is the pentose so i am not sure if tht is right but i also dont have the answer

 

[inspiron]

uracil is nitrogenous base and adenosine is nucleoside and ribose is the pentose so i am not sure if tht is right but i also dont have the answer

A nucleotide is a monomer or the structural unit of nucleotide chains forming nucleic acids as RNA and DNA.
A nucleotide consists of
1.a heterocyclic nucleobase,
2.a pentose sugar, and
3.a phosphate or polyphosphate group.

The nucleobase can be a purines or pyrimidines,
The sugar can be deoxyribose in DNA or ribose in RNA, and
The phosphate chain can be a monophosphate, diphosphate, or triphosphate.

A nucleotide that lacks the phosphate group is called nucleoside

Nucleobases: Adenine - Thymine or Uracil, Guanine, Cytosine,Adenine

Nucleosides: Adenosine - Thymidine or Uridine, Guanosine,Cytidine,Adenosine

Deoxynucleotides: dAMP - dTMP - dUMP - dGMP - dCMP - dADP - dTDP - dUDP - dGDP - dCDP - dATP - dTTP - dUTP - dGTP - dCTP

If the question was,
1.Which is nucleobase? Ans:uracil.
2.Which is nucleoside? Ans:adenosine.

But the question is,
Q) Which of the following is a nucleo tide
A. Urate
B. Uracil
C. Ribose
D. Adenosine
E. Thymidylate

So Nucleotide consists of nucleobase,sugar and phosphate.
we have 2 options,
B.uracil (seen in RNA nucleoside in a RNA nucleotide) and
c.ribose(seen in RNA pentose sugar in a RNA nucleotide).
quite confusing??????????????????

I hope n't to get such questions in my boards.I would appreciate anyone suggesting which might be the closet answer for this.

Thankyou.

 

[smilein]

Hey ,thanxs To All For The Answers

 

[mam6701e]

(((((((((((((((((((((((((((((((((((Q) Which of the following is a nucleo tide

A. Urate
B. Uracil
C. Ribose
D. Adenosine
E. Thymidylate

Ans:***Uracil or *Ribose ??????????????????????
Nucleotide consits of : Nitrogenous base
(adenine, guanine, cytosine, thymine or uracil)
Sugar(deoxy ribose or ribose)
Phosphate group.



uracil is nitrogenous base and “adenosine is nucleoside” and ribose is the pentose so i am not sure if tht is right but i also dont have the answer




A nucleotide is a monomer or the structural unit of nucleotide chains forming nucleic acids as RNA and DNA.
A nucleotide consists of
1.a heterocyclic nucleobase,
2.a pentose sugar, and
3.a phosphate or polyphosphate group.

The nucleobase can be a purines or pyrimidines,
The sugar can be deoxyribose in DNA or ribose in RNA, and
The phosphate chain can be a monophosphate, diphosphate, or triphosphate.

A nucleotide that lacks the phosphate group is called nucleoside

Nucleobases: Adenine - Thymine or Uracil, Guanine, Cytosine,Adenine

Nucleosides: “Adenosine” - Thymidine or Uridine, Guanosine,Cytidine,Adenosine

Deoxynucleotides: dAMP - dTMP - dUMP - dGMP - dCMP - dADP - dTDP - dUDP - dGDP - dCDP - dATP - dTTP - dUTP - dGTP - dCTP

If the question was,
1.Which is nucleobase? Ans:uracil.
2.Which is nucleoside? Ans:adenosine.

But the question is,
Q) Which of the following is a nucleo tide
A. Urate
B. Uracil
C. Ribose
D. Adenosine
E. Thymidylate

So Nucleotide consists of nucleobase,sugar and phosphate.
we have 2 options,
B.uracil (seen in RNA nucleoside in a RNA nucleotide) and
c.ribose(seen in RNA pentose sugar in a RNA nucleotide).
quite confusing?????????????????? ))))))))))))))))))))))))))))))





I agree with you guys that:
nucleoside is a composed of base + sugar and No phosphate
nucleotide is composed of base + sugar + phosphate
But I found the definition of Adenosine
It says: “Adenosine is a NUCLEOTIDE which consists of the nitrogenous base adenine linked to the sugar ribose” …………but it doe not say anything about the phosphate group and it refers to adenosine as a NUCLEOTIDE

 

[mam6701e]

(((((((((((((((((((((((((((Q)Solution A has pH of 7.0 and Solution B has a pH of 6.0.
Both solutions are of equal volume. Which of the following
statements about Solution A and B is MOSTaccurate?

A. A has 1/10 as many hydrogen ions as B
B. A has 10 times more Hydrogen ions than B
C. A has 7/6 of Hydrogen ion concentration of B
D. A has 6/7 of Hydrogen ion concentration of B

Ans:A
pH = -log[H+], A soln is neutral and has less H+ ions than B soln.
B soln has 10 times more hydrogen ions than soln A.)))))))))))))))))))))))


The answer is C
According to dental decks says that
Kw = pH + pOH

Where Kw is the ion product of water and equal 14
If they would have asked us what is the concentration of OH of each solution the answer would have been
Solution A: 7
Solution B: 8
But all the answers are related to the H concentration (Hydrogen ions) and the relationship bw the H ions of solutions A and B which are:
Solution A: 7
Solution B: 6
Answer C says “A has 7/6 of the hydrogen ion concentration of B” which means:
B * 7/6 = A
We know that hidrogens of B is 6
And hidrogens of A is 7, therefore:
6 * 7/6 = 7

 

[inspiron]

Nucleosides can be phosphorylated by specific kinases in the cell, producing nucleotides, which are the molecular building blocks of DNA and RNA.

Nucleoside triphosphates are the energy rich end products of the majority of biochemical energy releasing pathways.

I hope this will clear ur aspect.

 

[inspiron]

The answer is C
According to dental decks says that
Kw = pH + pOH

Where Kw is the ion product of water and equal 14
If they would have asked us what is the concentration of OH of each solution the answer would have been
Solution A: 7
Solution B: 8
But all the answers are related to the H concentration (Hydrogen ions) and the relationship bw the H ions of solutions A and B which are:
Solution A: 7
Solution B: 6
Answer C says “A has 7/6 of the hydrogen ion concentration of B” which means:
B * 7/6 = A
We know that hidrogens of B is 6
And hidrogens of A is 7, therefore:
6 * 7/6 = 7

The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution. The letters pH stand for "power of hydrogen" and the numerical value is defined as the negative base 10 logarithm of the molar concentration of hydrogen ions.
pH = -log10[H+]

Table 1 gives examples of pH values and corresponding hydrogen ion concentrations. It is important to note that an increase of one pH point results in a ten-fold decrease in hydrogen ion concentration.

Table 1: pH and Hydrogen ion concentration
pH : [H+] nanomol/l
6.0: 1000
7.0: 100
8.0: 10
9.0: 1

pH scale is used to express hydrogen ion concentration,where pH=-log(H+). thus Ph above 7 is basic and pH below 7 is acidic. Because of the logarithmic scale, a solution of pH has ten times the hydrogen ion conc of a soln at pH 7.

hope I'm right.Please let me know.

 

[shady]

urate-degradation of pyrimidine causes urate crystals
thymidilate-thymidilate synthesis is used for nucleotide formation

if iam wrong pls correct me

thymidialte kinases is to activate the nuclaotide

 

[mam6701e]

Q) Which of the following is a nucleo tide

A. Urate
B. Uracil
C. Ribose
D. Adenosine
E. Thymidylate



Thanq

Guys I got this information from a great source: “human molecular genetics” pag 4
(ISBN: 0815341822)

Base Nucleoside Nucleotide
Adenine Adenosine AMP (adenosine monophosphate) or Adenylate
Guanine Guanosine GMP (guanosine monophpsphate) or Guanylate
Cytosine Cytidine CMP (cytidine monophosphate) or Cytidylate
Thymine Thymidine TMP (thymidine monophosphate) or Thymidylate
Uracil Uridine UMP (uridine monophosphate) or Uridylate


Like we know: nucleotide is a nucleoside plus 1, 2 or 3 phosphate

So, the answer is thymidylate 😀

 

[manik khisti]

Guys I got this information from a great source: “human molecular genetics” pag 4
(ISBN: 0815341822)

Base Nucleoside Nucleotide
Adenine Adenosine AMP (adenosine monophosphate) or Adenylate
Guanine Guanosine GMP (guanosine monophpsphate) or Guanylate
Cytosine Cytidine CMP (cytidine monophosphate) or Cytidylate
Thymine Thymidine TMP (thymidine monophosphate) or Thymidylate
Uracil Uridine UMP (uridine monophosphate) or Uridylate


Like we know: nucleotide is a nucleoside plus 1, 2 or 3 phosphate

So, the answer is thymidylate 😀

hi there
great job.
thanks for the clarification
manik