Question

multiple choice question
the mechanism by which contracting limb muscles squeeze blood out of the compressed part of a vein in only one direction is known as which of the following?

• the skeletal muscle pump
• cardiac suction
• the thoracic pump
• the cardiac pump

Explanation:

The question is about the mechanism of blood flow in veins via contracting limb muscles. The skeletal muscle pump involves skeletal muscles (limb muscles) compressing veins to push blood in one direction. Cardiac suction relates to heart's suction, thoracic pump to thoracic cavity changes, and cardiac pump is the heart's pumping. So the correct option is the one about skeletal muscle pump.

Answer:

A. The skeletal muscle pump