Anatomy MCQs Set3 with key

1.Paralysis of 3rd, 4th and 6th cranial nerves with involvement of ophthalmic division of trigeminal, localizes the lesion to:

A. Cavernous sinus
B. Apex of orbit
C. Brainstem
D. Base of skull
Correct answer : A. Cavernous sinus
3,4,5 cranial nerves pass in relation to the lateral wall of cavernous sinus. 6th cranial nerve passes through the cavernous sinus.

 

 

 

2.All of the following are branches of the external carotid artery except:

A. Superior thyroid artery
B. Anterior Ethmoidal artery
C. Occipital artery
D. Posterior auricular artery
Correct answer : B. Anterior Ethmoidal artery
Anterior ethmoidal artery arises from ophthalmic branch of internal carotid artery.

 

 

 

3.In an adult male, on per rectal examination, the following structures can be felt anteriorly except:

A. Internal iliac lymph nodes
B. Bulb of the penis
C. Prostate
D. Seminal vesicle when enlarged
Correct answer : A. Internal iliac lymph nodes
Internal iliac lymph nodes can be palpated laterally when they are enlarged, not anteriorly.

 

 

 

 

4.The following group of lymph nodes receives lymphatics from the uterus except:

A. External iliac
B. Internal iliac
C. Superficial inguinal
D. Deep inguinal
Correct answer : D. Deep inguinal

 

 

 

5.All of the following statements regarding vas deferens are true except:

A. The terminal part is dilated to form ampulla
B. It crosses ureter in the region of ischial spine
C. lt passes lateral to inferior epigastric artery at deep inguinal ring
D. It is separated from the base of bladder by the peritoneum
Correct answer : D. It is separated from the base of bladder by the peritoneum
There is no peritoneal layer between vas deferens and the bladder.

 

 

 

6.The Prostatic urethra is characterized by all of the following features, except that it:

A. ls the widest and most dilatable part
B. Presents a concavity posteriorly
C. Lies closer to anterior surface of prostate
D. Receives Prostatic ductules along its posterior wall
Correct answer : B. Presents a concavity posteriorly
Prostatic urethra is concave anteriorly.

 

 

7.Benign Prostatic hypertrophy results in obstruction of the urinary tract. The specific condition is associated with enlargement of the:

A. Entire prostate gland
B. Lateral lobes
C. Median lobe
D. Posterior lobes
Correct answer : C. Median lobe
Median lobe of prostate is prone to development of BPH.
Posterior lobe of prostate is prone to development of malignancy.

 

 

8.In which of the following a reduction in arterial oxygen tension occurs?

A. Anaemia
B. CO poisoning
C. Moderate exercise
D. Hypoventilation
Correct answer : D. Hypoventilation
Reduction in arterial oxygen tension occurs in respiratory failure – Type 1 (decreased oxygenation) or Type 2 (defective ventillation).

 

 

9.While doing thoracocentesis, it is advisable to introduce needle along:

A. Upper border of the rib
B. Lower border of the rib
C. In the center of the intercostal space
D. In the anterior part of the intercostal space
Correct answer : A. Upper border of the rib
The intercostal neurovascular bundle lies along the lower boder of the rib. Hence we should introduce the needle along the upper border of rib to prevent damage to the neurovascular bundle.

 

 

10.The femoral ring is bounded by the following structures except:

A. Femoral vein
B. Inguinal ligament
C. Femoral artery
D. Lacunar ligament
Correct answer : C. Femoral artery
Boundaries of femoral ring:
Anterior – Inguinal ligament
Medial – Lacunar ligament
Posterior – Pectineus and covering fascia
Lateral – Septum separating it from femoral vein