VT Anatomy & Physiology 2

Question 1

Which layer of the arterial wall contains smooth muscle cells and is primarily responsible for vasoconstriction?

Accepted Answer

Tunica media

Answer

The tunica media contains smooth muscle cells and elastic fibers that regulate vessel diameter through vasoconstriction and vasodilation.

Question 2

The celiac artery is the first unpaired branch of the abdominal aorta and supplies blood to which organs?

Accepted Answer

Liver, stomach, and spleen

Answer

The celiac artery (celiac trunk) divides into the left gastric, splenic, and common hepatic arteries, supplying the liver, stomach, and spleen.

Question 3

Which valve prevents backflow of blood from the pulmonary artery into the right ventricle?

Accepted Answer

Pulmonic (pulmonary) valve

Answer

The pulmonic valve, a semilunar valve, closes during ventricular diastole to prevent regurgitation of blood from the pulmonary artery back into the right ventricle.

Question 4

What is the primary function of the vasa vasorum?

Accepted Answer

Supply nutrients to the walls of large vessels

Answer

Vasa vasorum are tiny blood vessels within the walls of large arteries and veins that supply oxygen and nutrients to the tunica media and adventitia.

Question 5

The profunda femoris (deep femoral) artery typically originates from which vessel?

Accepted Answer

Common femoral artery

Answer

The profunda femoris arises from the posterolateral aspect of the common femoral artery, approximately 3–5 cm below the inguinal ligament.

(VT) Vascular Technician Certification Practice Test

(VT) Vascular Technician Certification Practice Test

VT Anatomy & Physiology 2