MCAT Anatomy 5

Question 1

The saphenous nerve, the largest cutaneous branch of the femoral nerve, accompanies which vessel in the leg?

Accepted Answer

Great saphenous vein

Answer

The saphenous nerve runs with the great saphenous vein along the medial aspect of the leg, providing cutaneous innervation to the medial leg and foot.

Question 2

The parotid duct (Stensen's duct) pierces which muscle to enter the oral cavity?

Accepted Answer

Buccinator

Answer

The parotid duct travels anteriorly, turns medially to pierce the buccinator muscle, and opens opposite the upper second molar.

Question 3

Which branch of the brachial plexus innervates the coracobrachialis, biceps brachii, and brachialis?

Accepted Answer

Musculocutaneous nerve

Answer

The musculocutaneous nerve (C5-C7) innervates all three muscles of the anterior compartment of the arm before continuing as the lateral cutaneous nerve of the forearm.

Question 4

The lymphatic drainage of the testes follows which vessels to drain into which lymph nodes?

Accepted Answer

Testicular (gonadal) vessels to para-aortic nodes

Answer

The testes drain to para-aortic (lumbar) lymph nodes because the testes developed retroperitoneally near the kidneys before descending.

Question 5

The fovea centralis of the retina is specialized for high-acuity color vision and is densely packed with which photoreceptors?

Accepted Answer

Cones only

Answer

The fovea centralis contains only cones (no rods, no blood vessels) to maximize visual acuity and color discrimination in bright light.

MCAT - Medical College Admission Test Practice Test

MCAT - Medical College Admission Test Practice Test

MCAT Anatomy 5