Which of the Following Factors Aids Venous Return to the Heart

question 82

Multiple Choice

Which of the following factors aids venous return to the heart?

• A) sympathetic stimulation of capillaries
• B) skeletal muscle pump squeezing blood through veins
• C) respiratory pump providing a pressure gradient between the lower and chest veins
• D) sympathetic stimulation of capillaries and skeletal muscle pump squeezing blood through veins
• E) skeletal muscle pump squeezing blood through veins and respiratory pump providing a pressure gradient between the lower and chest veins

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Definitions:

Resting Potential

Resting potential refers to the electric potential difference across the neuronal membrane when the neuron is not actively sending a signal.

Absolute Refractory Period

The period immediately following the firing of a nerve fiber when it cannot be stimulated to fire again, no matter how strong the incoming signal.

Action Potential

A momentary change in electrical potential on the surface of a neuron that occurs when it is stimulated and is capable of transmitting a signal along the neuron.

Millivolts

A unit of electric potential equal to one thousandth of a volt.