What Mechanisms Assist Venous Return

question 41

Multiple Choice

What mechanisms assist venous return?

• A) One-way valves, increasing diameter of veins, peripheral resistance
• B) Pressure changes during breathing, one-way valves, thickness of the tunica media in medium-sized veins
• C) Skeletal muscle contractions, large-diameter lumen, thickness of the tunica media in medium-sized veins
• D) One-way valves, skeletal muscle contractions, pressure changes during breathing

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