Blood Is Propelled Back to the Heart by ________

question 6

Multiple Choice

Blood is propelled back to the heart by ________.

• A)rhythmic contractions of muscles in the walls of veins and the action of one-way valves
• B)skeletal muscle contractions around veins and the action of one-way valves
• C)the negative pressure of the heart pulling blood into the empty chambers
• D)the natural flow of blood into ever-larger blood vessels leading to the heart

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Definitions:

Artificially Induced

A process or state that is caused to happen through artificial means rather than occurring naturally.

Naturally Induced

Refers to processes or conditions triggered by natural factors rather than artificial or human interventions.

Natural Exposure

Contact with natural environmental factors, such as sunlight or pathogens, without human intervention.

Artificially Induced

A condition or state brought about by external intervention rather than occurring naturally.