CSFA Anatomy & Physiology 3

Question 1

During a total knee arthroplasty, which artery anastomosis forms the geniculate network around the knee joint?

Accepted Answer

Popliteal artery and its five geniculate branches

Answer

The popliteal artery gives off five geniculate arteries (superior medial, superior lateral, middle, inferior medial, inferior lateral) that form the anastomotic network around the knee.

Question 2

The thoracic duct terminates by emptying into which venous structure?

Accepted Answer

Left subclavian vein at its junction with the internal jugular vein

Answer

The thoracic duct empties into the venous system at the junction of the left subclavian and left internal jugular veins (left venous angle).

Question 3

Which spinal cord segment levels are responsible for the phrenic nerve, making high cervical injuries potentially fatal?

Accepted Answer

C3-C5

Answer

The phrenic nerve arises from cervical roots C3, C4, and C5 (primarily C4), and injuries above C3 paralyze the diaphragm, preventing spontaneous breathing.

Question 4

During an appendectomy via McBurney's incision, which three muscle layers are split in sequence after incising the skin?

Accepted Answer

External oblique, internal oblique, transversus abdominis

Answer

The McBurney incision splits the external oblique aponeurosis, then bluntly splits the internal oblique and transversus abdominis muscle fibers.

Question 5

The zona fasciculata of the adrenal cortex primarily produces which class of hormones?

Accepted Answer

Glucocorticoids

Answer

The zona fasciculata is the middle and largest zone of the adrenal cortex, primarily responsible for producing glucocorticoids such as cortisol.

CSFA - Certified Surgical First Assistant Practice Test

CSFA - Certified Surgical First Assistant Practice Test

CSFA Anatomy & Physiology 3