MOH Anatomy & Physiology 2

Question 1

Which cranial nerve is tested when checking the gag reflex?

Accepted Answer

CN IX (glossopharyngeal) and CN X (vagus)

Answer

The afferent limb of the gag reflex is CN IX (glossopharyngeal) and the efferent motor response is mediated by CN X (vagus), together testing the integrity of the brainstem.

Question 2

Cerebrospinal fluid (CSF) is primarily produced by:

Accepted Answer

Choroid plexus

Answer

The choroid plexus, located within the ventricles of the brain, produces approximately 500 mL of CSF per day by active secretion and ultrafiltration of plasma.

Question 3

Normal adult tidal volume is approximately:

Accepted Answer

500 mL

Answer

Normal adult tidal volume — the amount of air inhaled or exhaled in a single resting breath — is approximately 500 mL (7 mL/kg of ideal body weight).

Question 4

The portal vein is formed by the union of which two vessels?

Accepted Answer

Superior mesenteric vein and splenic vein

Answer

The portal vein is formed by the confluence of the superior mesenteric vein and the splenic vein behind the neck of the pancreas, draining nutrient-rich blood to the liver.

Question 5

Insulin is secreted by which cells of the pancreatic islets of Langerhans?

Accepted Answer

Beta cells

Answer

Beta cells of the islets of Langerhans secrete insulin in response to elevated blood glucose, promoting glucose uptake by cells and reducing blood sugar levels.

MOH UAE Practice Test

MOH UAE Practice Test

MOH Anatomy & Physiology 2