525. Which is the Nucleus of Masseteric Reflex

a.       Chief Sensory Nucleus

b.      Nucleus of Spinal Tract of Trigeminal Nerve

c.       Nucleus of Mesencephalic Tract of Spinal Nerve

d.      Dorsal Vagal Nucleus

 

524. All of the following are Somatic Efferent except

a.       Facial nerve

b.      III Nerve

c.       IV Nerve

d.      VI Nerve

 

 

515. An abrasion results in the total loss of epidermis over a large area of an arm, but one month later, the abrasion has healed, with regrowth of the epidermis. Which of the following mechanisms accounts for the restoration of the epidermis over the abraded area?

 A.  Growth of epidermis from hair follicles and sweat glands in the dermis
 B.  Migration of endothelial cells from newly grown capillaries
 C.  Transformation of dermal fibroblasts into epidermal cells
 D.  Transformation of macrophages into epidermal cells
 E.  Transformation of melanocytes into epidermal cells

508. A major sensory innervation of the temporomandibular joint is derived from the

1. great auricular nerve.
2. auriculotemporal nerve.
3. inferior alveolar nerve.
4. temporal branches of the facial nerve.

502.Wallenberg syndrome is due to the complete infarction of

a.Posterior inferior cerebellar artery
b.Anterior inferior cerebellar artery
c.posterior cerebral artery
d.spinal artery

Ans-a.Posterior inferior cerebellar artery

453.The lower lip gets sensory supply through the

a.Buccal branch of facial nerve

b.Buccal branch of mandibular nerve

c.Mandibular branch of facial nerve

d.Mental nerve

Ans-d.Mental nerve

384.An autosomal dominant trait showing 50 percent penetrance will be phenotypically expressed in what percent of the offspring?

A.     0

B.     25

C.     33 

D.     50

Ans-b.25%

255.All are structures present in the lateral wall of cavernous sinus except

a.occulomotor nerve
b.trochlear nerve
c.maxillary nerve
d.abducent nerve

Ans-d.abducent nerve
Explanation-abducent nerve and internal carotid artery passes through centre of sinus.

251.) A person showing two cell lines derived from two different zygotes is?

a) Chimerism
b) Mosaicism
c) Segregation
d) Pseudo-dominance

Ans-a)Chimerism

Explanation:a chimera is an animal that has two or more different populations of genetically distinct cells that originated in different zygotes; if the different cells emerged from the same zygote, it is called a mosaicism.

234.All of the following muscles are composite muscles except

a.Pectineus
b.Rectus femoris
c.Adductor magnus
d.Biceps femoris

Ans-b.Rectus femoris

Explanation:BDC II /4th ed pg 64/Gray's 39 ed /1467,1469

233.Tributary of the cavernous sinus includes all of the following,except:

a.Superior petrosal sinus
b.Inferior petrosal sinus
c.Superfficial middle cerebral vein
d.Deep middle cerebral vein


Ans-a.Deep middle cerebral vein

Ref BDC III/4th ed /pg 94

225.Which of the following is the action of styloglossus?

1.Acts to protrude the tongue and retract tip of tongue.
2.Acts to pull sides of tongue downward and aids retrusion.
3.Acts to draw up the tongue to create a trough for
swallowing.
4.Flattens and broadens tongue.


Ans:3.Acts to draw up the tongue to create a trough for
swallowing.

224.Vertebral artery is the branch of:

1.Thyrocervical trunk.
2.First branch of the subclavian artery.
3.Second branch of the subclavian artery.
4.Inferior thyroid artery.

Ans:2.First branch of the subclavian artery.

Explanation:ref gray's anatomy pg928

87. Which nerve passes through Menke’s cave?

1. Abducent.

2. Facial.

3. Trigeminal.

4. Trochlear.

Ans: 3

88. Angle of the jaw is supplied by:

1. Great auricular nerve.

2. Lesser occipital nerve.

3. Greater occipital nerve.

4. Posterior auricular nerve.

Ans: 1

89. Which is true about opening of jaw?

1. Lateral pterygoid muscle contracts.

2. Movement in vertical axis.

3. Articular disc moves backwards.

4. Head of the mandible moves forwards.

Ans: 1

90. The branches of the external carotid artery do not include:

1. Facial artery.

2. Lingual artery.

3. Maxillary artery.

4. Inferior thyroid artery.

Ans: 4

91. Which vertebra has the most prominent spine?

1. C2.

2. C7.

3. T10.

4. L2.

Ans: 2

92. All are tributaries of cavernous sinus except:

1. Superior ophthalmic vein.

2. Central vein of retina.

3. Superficical middle cerebral vein.

4. Superior sagital sinus.

Ans: 4

93. Which is palpable at the anterior border of masseter?

1. Stensons duct.

2. Submandibular duct.

3. Facial nerve.

4. Maxillary artery.

Ans: 1

94. Which is true regarding parotid gland?

1. Stenson's and Wharton's duct join and open at the upper second molar teeth.

2. Stenson's duct opens opposite upper second molar teeth.

3. Parotid duct pierces the masseter.

4. Developed from mesoderm.

Ans:2

95. Which of the following is derived from cartilage of the third arch?

1. Styloid process.

2. Malleus.

3. Incus.

4. Greater cornu of hyoid.

Ans: 4

86.During a cranial nerve test, the patient cannot elevate her right eye from the abducted position. Which of the following muscles is paralyzed?

A.Rt IO
B.Rt IR
C.Rt LR
D.Rt SO
E. Rt SR

ANS.E. The superior rectus muscle can elevate and adduct the eye from the
neutral position. From the abducted position, it is the only muscle that can elevate the eye.
The inferior oblique muscle (choice A) can elevate and abduct the eye from the neutral position.
From the adducted position, it is the only muscle that can elevate the eye.
The inferior rectus muscle (choice B) can depress and adduct the eye from the neutral position. From
the abducted position, it is the only muscle that can depress the eye.
The lateral rectus muscle (choice C) can abduct the eye.
The superior oblique muscle (choice D) can depress and abduct the eye from the neutral position.
From the adducted position, it is the only muscle that can depress the eye.

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85.Axial bones in skull are:

1. 8. 2. 14.

3. 22. 4. 28.

ANS. 4

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78.The major structural component of the sperm flagellum is the:

A. microtubule
B. microfilament
C. actin filament
D. mysosin filament
E. ciliary body

ANS A. This is a basic histological question of a type found commonly on NBDE, which asks about basic cellular organelles and structures. The sperm cell flagellum is notable for a “9+2” arrangement of fibers formed from microtubules. The 9 single fibers form a circular ring in cross section around the 2 doubled fibers in the center. One of the significant facts about the fibers is
that they are composed of microtubules, made up of tubulin. The other significant fact is that all eucaryotic flagella and cilia have this same structure (for example, cilia form the tracheal lining). Note that procaryotic (bacterial) flagellea do NOT share this structure.


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77.Which muscle is the chief mover of the mandible TOWARD the left?

A. Left medial pterygoid
B. Left lateral pterygoid
C. Right medial pterygoid
D. Right lateral pterygoid

ANS.D. There are two methods for answering this question. The formula method

states that the right lateral pterygoid moves the mandible left, whereas the left lateral pterygoid moves

the mandible right. The understanding method begins with the idea that the medial pterygoid is a

closer (elevator). The lateral pterygoid connects to the condyle and is a protruder. If the right lateral

pterygoid pulls the right condyle out while the left lateral pterygoid and condyle remain stable, the left

side will act as a stationary pivot point while the right side protrudes outward and also toward the left

(medially).

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63.Injury at the lower border of a rib will most likely damage which structure?

A. intercostal a. B. intercostal n.
C. intercostal v. D. internal intercostal muscle

ANS>B. The three structures in the intercostal space are, from superior to inferior, the intercostal vein, artery, and nerve. The proper site for insertion of an intercostal drain is superior to a rib, not directly at the level of the superior border but slightly higher to avoid the collateral branches of the nerve, artery, and vein. The nerve is the most inferior structure and thus most likely to be damaged by the drain (producing an anesthetic dermatome). In addition, the nerve is the least protected by the costal groove.

The intercostal artery (choice A) is the middle structure and thus is not the most likely to be damaged.

The intercostal vein (choice C) is the most superior structure and is thus the least likely to be damaged. In addition, the vein is the structure best protected by the costal groove (the further superior the structure, the more protected by the costal groove).

The internal intercostal fibers (choice D) will tend to be separated by the drain. In addition, the internal intercostal muscle is membranous (internal intercostal membrane) posteriorly, from the neck of the rib to its angle; therefore, many drains, when inserted, will not even pass through a layer of internal intercostal muscle.


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55.Which of the following is NOT a Neural Crest Derivatives:

a. Odontoblasts b. Bones of the face and skull
c. Melanocytes d. None

ANS>D

Neural Crest Derivatives

• · Connective tissue and bones of the face and skull
• 
  
• · Cranial nerve ganglia
• 
  
• · C cells of the thyroid gland
• 
  
• · Conotruncal septum in the heart
• 
  
• · Odontoblasts
• 
  
• · Dermis in face and neck
• 
  
• · Spinal (dorsal root) ganglia
• 
  
• Sympathetic chain and preaortic ganglia
• Parasympathetic ganglia of the gastrointestinal tract
• Adrenal medulla
• Schwann cells
• Glial cells
• Arachnoid and pia mater (leptomeninges)
• Melanocytes

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