Which of the following mechanisms facilitate venous return to the heart?
1) Sodium/potassium pump
2) Sympathetic venomotor tone
3) Cardiac suction
4) Skeletal muscle contraction
A)1 and 2 only
B)2, 3, and 4 only
C)1, 2, 3, and 4
D)3 and 4 only

Question

Quizplus · Accepted Answer

The mechanisms that facilitate venous return to the heart include sympathetic venomotor tone, cardiac suction, and skeletal muscle contraction. The sodium/potassium pump is not directly involved in the facilitation of venous return. Therefore, option 1 is incorrect. Options 2, 3, and 4 are all correct as they are considered important mechanisms that facilitate venous return.

Which of the Following Mechanisms Facilitate Venous Return to the Heart