BHS Anatomy and Physiology 4

Question 1

Which muscle is the prime mover for elbow flexion when the forearm is supinated?

Accepted Answer

Biceps brachii

Answer

The biceps brachii is the primary elbow flexor when the forearm is supinated, aided by the brachialis and brachioradialis.

Question 2

The blood-brain barrier is primarily formed by:

Accepted Answer

Astrocyte end-feet and tight junctions in capillary endothelium

Answer

The blood-brain barrier is maintained by tight junctions between cerebral capillary endothelial cells, supported by astrocyte end-feet.

Question 3

Which vitamin is required for the synthesis of clotting factors II, VII, IX, and X?

Accepted Answer

Vitamin K

Answer

Vitamin K is a cofactor for gamma-carboxylation of clotting factors II, VII, IX, and X, making them functionally active.

Question 4

The primary site of erythropoiesis in adults is the:

Accepted Answer

Red bone marrow

Answer

In adults, red blood cells are produced in the red bone marrow of flat and irregular bones such as the sternum, ribs, and pelvis.

Question 5

The Cori cycle describes the metabolic relationship between which two organs?

Accepted Answer

Liver and skeletal muscle

Answer

The Cori cycle involves lactate produced by anaerobic glycolysis in skeletal muscle being transported to the liver and converted back to glucose.

BHS - Bachelor of Health Science Practice Test