CSFA Anatomy & Physiology 2

Question 1

Which nerve is at risk during a laparoscopic cholecystectomy when the cystic duct is being dissected near the hepatoduodenal ligament?

Accepted Answer

Vagus nerve branches

Answer

Vagal branches run along the hepatoduodenal ligament and can be damaged during dissection near the cystic duct.

Question 2

The lymphatic drainage of the lower rectum primarily flows to which lymph node group?

Accepted Answer

Internal iliac nodes

Answer

The lower rectum drains primarily to the internal iliac (hypogastric) lymph nodes, which is clinically significant in rectal cancer staging.

Question 3

Which layer of the abdominal wall is absent in the posterior sheath below the arcuate line?

Accepted Answer

Posterior layer of internal oblique aponeurosis

Answer

Below the arcuate line, all aponeurotic layers pass anterior to the rectus muscle, leaving only transversalis fascia posteriorly.

Question 4

During a radical prostatectomy, which anatomical structure must be carefully preserved to maintain urinary continence?

Accepted Answer

External urethral sphincter

Answer

The external urethral sphincter (rhabdosphincter) is the primary muscle responsible for continence after radical prostatectomy since the internal sphincter is typically disrupted.

Question 5

The ductus arteriosus connects which two vascular structures in fetal circulation?

Accepted Answer

Pulmonary artery to aorta

Answer

The ductus arteriosus shunts blood from the pulmonary artery to the descending aorta, bypassing the non-functional fetal lungs.

CSFA - Certified Surgical First Assistant Practice Test

CSFA - Certified Surgical First Assistant Practice Test

CSFA Anatomy & Physiology 2