How Do Respiratory Movements and Skeletal Muscle Contraction Affect Circulation

question 26

Multiple Choice

How do respiratory movements and skeletal muscle contraction affect circulation?

• A) They are synergistic because both assist circulation by squeezing and "pumping" venous blood.
• B) They are antagonistic forces because skeletal muscles assist venous blood movement, but respiratory activity inhibits venous movement.
• C) Both synergistically lower blood pressure by enhancing vasodilation, which directly stimulates the cardiac regulatory center.
• D) Both synergistically increase blood pressure by stimulating the sympathetic nervous system to vasodilate arteries.

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