OT Anatomy & Physiology 4

Question 1

Which neurotransmitter is primarily released at the neuromuscular junction to initiate muscle contraction?

Accepted Answer

Acetylcholine

Answer

Acetylcholine is released from motor neuron terminals and binds to nicotinic receptors on the motor end plate, triggering muscle fiber depolarization.

Question 2

In the context of hand therapy, the A1 pulley is located at the level of which structure?

Accepted Answer

Metacarpophalangeal joint

Answer

The A1 pulley overlies the metacarpophalangeal joint and is the site most commonly involved in trigger finger (stenosing tenosynovitis).

Question 3

Which phase of the cardiac cycle represents ventricular filling?

Accepted Answer

Diastole

Answer

During diastole, the ventricles relax and fill with blood from the atria through the open atrioventricular valves.

Question 4

The zona pellucida is associated with which anatomical structure?

Accepted Answer

Ovarian follicle/oocyte

Answer

The zona pellucida is a glycoprotein layer surrounding the oocyte and early embryo, playing a critical role in fertilization and implantation.

Question 5

A client has difficulty extending the wrist and fingers following a humeral shaft fracture. Which nerve is most likely injured?

Accepted Answer

Radial nerve

Answer

The radial nerve winds in the spiral groove of the humerus and is vulnerable to injury with humeral shaft fractures, causing wrist drop and loss of finger extension.

OT - Master of Occupational Therapy Practice Test

OT - Master of Occupational Therapy Practice Test

OT Anatomy & Physiology 4