Certified Surgical Technologist Anatomy and Physiology 5

Question 1

The lymphatic drainage of the breast primarily flows to which group of lymph nodes?

Accepted Answer

Axillary lymph nodes

Answer

Approximately 75% of breast lymphatic drainage flows to the axillary lymph nodes, which is why they are assessed and often dissected during breast cancer surgery.

Question 2

The Circle of Willis provides collateral cerebral circulation. Which vessel is NOT a component of the Circle of Willis?

Accepted Answer

Middle cerebral artery

Answer

The middle cerebral artery branches off the internal carotid but is not part of the Circle of Willis itself, which includes the communicating arteries and their connecting vessels.

Question 3

Which structure is the landmark for the femoral triangle and lies between the femoral artery and the femoral canal?

Accepted Answer

Femoral vein

Answer

In the femoral triangle, the arrangement from lateral to medial is: femoral Nerve, femoral Artery, femoral Vein, empty space/canal (NAVY).

Question 4

The rotator cuff is composed of four muscles. Which rotator cuff muscle is most commonly torn?

Accepted Answer

Supraspinatus

Answer

The supraspinatus tendon is the most commonly torn rotator cuff muscle because it passes through the narrow subacromial space and is subject to impingement.

Question 5

During a thyroidectomy, the recurrent laryngeal nerve must be identified. Damage to this nerve results in:

Accepted Answer

Hoarseness or voice changes

Answer

The recurrent laryngeal nerve innervates all intrinsic laryngeal muscles except the cricothyroid; injury causes hoarseness, and bilateral injury can cause airway obstruction.

Certified Surgical Technologist Practice Test

Certified Surgical Technologist Practice Test

Certified Surgical Technologist Anatomy and Physiology 5