Author Question: Which vein(s) is(are) responsible for most of the venous return in the arm? a. Deep b. Ulnar c. ... (Read 108 times)

darbym82 · **on:** Jun 25, 2018

Which vein(s) is(are) responsible for most of the venous return in the arm?

a. Deep
b. Ulnar
c. Subclavian
d. Superficial

Question 2

The nurse is reviewing venous blood flow patterns. Which of these statements best describes the mechanism(s) by which venous blood returns to the heart?

a. Intraluminal valves ensure unidirectional flow toward the heart.
b. Contracting skeletal muscles milk blood distally toward the veins.
c. High-pressure system of the heart helps facilitate venous return.
d. Increased thoracic pressure and decreased abdominal pressure facilitate venous return to the heart.

Liddy · **Reply #1 on:** Jun 25, 2018

Answer to Question 1

ANS: D
The superficial veins of the arms are in the subcutaneous tissue and are responsible for most of the venous return.

Answer to Question 2

ANS: A
Blood moves through the veins by (1) contracting skeletal muscles that proximally milk the blood; (2) pressure gradients caused by breathing, during which inspiration makes the thoracic pressure decrease and the abdominal pressure increase; and (3) the intraluminal valves, which ensure unidirectional flow toward the heart.