BCSE Anatomy 2

Question 1

Which nerve is most commonly injured in a mid-shaft humeral fracture?

Accepted Answer

Radial nerve

Answer

The radial nerve runs in the spiral groove of the humerus and is vulnerable to injury in mid-shaft humeral fractures.

Question 2

The hepatoduodenal ligament (portal triad) contains all of the following EXCEPT:

Accepted Answer

Hepatic vein

Answer

The hepatoduodenal ligament contains the portal vein, hepatic artery proper, and common bile duct; the hepatic vein drains directly into the inferior vena cava.

Question 3

Which muscle is responsible for abduction of the vocal cords?

Accepted Answer

Posterior cricoarytenoid

Answer

The posterior cricoarytenoid is the only intrinsic laryngeal muscle that abducts the vocal cords by rotating the arytenoids laterally.

Question 4

The inguinal (Hesselbach's) triangle is bounded by which three structures?

Accepted Answer

Inguinal ligament, rectus abdominis, inferior epigastric vessels

Answer

Hesselbach's triangle is bounded inferiorly by the inguinal ligament, medially by the rectus abdominis, and laterally by the inferior epigastric vessels.

Question 5

Damage to the anterior horn cells at C3–C5 spinal levels would most likely produce:

Accepted Answer

Ipsilateral diaphragm paralysis

Answer

The phrenic nerve arises from C3–C5 and innervates the diaphragm; anterior horn cell damage at these levels causes ipsilateral diaphragmatic paralysis.

BCSE - Basic and Clinical Sciences Examination Practice Test

BCSE - Basic and Clinical Sciences Examination Practice Test

BCSE Anatomy 2