MCAT Anatomy 2

Question 1

Which nerve innervates the diaphragm?

Accepted Answer

Phrenic nerve (C3-C5)

Answer

The phrenic nerve, arising from cervical spinal levels C3-C5, provides motor innervation to the diaphragm.

Question 2

The coronary sinus drains into which cardiac chamber?

Accepted Answer

Right atrium

Answer

The coronary sinus collects venous blood from the myocardium and drains into the right atrium.

Question 3

Which ligament connects the liver to the anterior abdominal wall and contains the ligamentum teres hepatis?

Accepted Answer

Falciform ligament

Answer

The falciform ligament attaches the liver to the anterior abdominal wall and contains the ligamentum teres hepatis (obliterated umbilical vein).

Question 4

The inguinal ligament is formed by the lower edge of which abdominal muscle's aponeurosis?

Accepted Answer

External oblique

Answer

The inguinal ligament is the folded-under lower edge of the external oblique aponeurosis, running from the ASIS to the pubic tubercle.

Question 5

Broca's area, responsible for speech production, is located in which lobe of the brain?

Accepted Answer

Frontal lobe

Answer

Broca's area is located in the inferior frontal gyrus of the frontal lobe (Brodmann areas 44 and 45).

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