Which of the following factors assists in the return of venous blood to the heart?
(1) Arterial dilation
(2) Valves in the veins
(3) Sympathetic stimulation
(4) Compression of veins by muscular movements
A) 1 and 2
B) 1, 2, 3
C) 1, 2, 3, 4
D) 2, 3, 4
E) 1, 3, 4

Question

Quizplus · Accepted Answer

Valves in the veins prevent backflow of blood, sympathetic stimulation increases venous return by vasoconstriction, and muscular movements compress veins, helping to push blood back to the heart. Arterial dilation does not directly assist venous return.

Which of the Following Factors Assists in the Return of Venous