VA-BC Vascular Anatomy & Physiology 3

Question 1

Which of the following describes the vasa vasorum?

Accepted Answer

Small vessels supplying the walls of large blood vessels

Answer

The vasa vasorum are small blood vessels that supply oxygen and nutrients to the walls of larger blood vessels, particularly in the tunica adventitia and outer media.

Question 2

When a patient's arm is placed in a dependent position, venous pressure in the antecubital fossa increases primarily due to:

Accepted Answer

Hydrostatic pressure from the column of blood

Answer

Placing the arm in a dependent position adds hydrostatic pressure (the weight of the blood column) to venous pressure, making veins more engorged and visible.

Question 3

Which nerve runs in close proximity to the basilic vein in the medial upper arm, making deep basilic vein access potentially risky?

Accepted Answer

Median nerve

Answer

The median nerve runs near the basilic vein in the upper arm, and inadvertent puncture or compression can cause paresthesia or nerve injury.

Question 4

The thoracic duct drains lymph into which vascular structure?

Accepted Answer

Left subclavian vein at the junction with the left internal jugular vein

Answer

The thoracic duct empties into the venous system at the junction of the left subclavian and left internal jugular veins, returning lymph to circulation.

Question 5

Poiseuille's Law states that blood flow through a vessel is most sensitive to changes in:

Accepted Answer

Vessel radius

Answer

Poiseuille's Law shows flow is proportional to the fourth power of the radius, making small changes in radius have a dramatic effect on flow rate.

(VA-BC) Vascular Access Nurse Certification Practice Test

(VA-BC) Vascular Access Nurse Certification Practice Test

VA-BC Vascular Anatomy & Physiology 3