It is the measure of force with which blood pushes up against the walls of blood vessels.
Correct answer: C. Blood pressure
- A. Stroke volume
- B. Cardiac output
- C. Blood pressure
- D. Blood flow
Explanation
Blood pressure is the force exerted by circulating blood against the walls of blood vessels, usually expressed in mmHg. Students may choose blood flow, but flow means the movement or volume of blood, not the pressure causing force on vessel walls.
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About Blood Vessels
Blood vessels include arteries, arterioles, capillaries, venules and veins, whose wall thickness, elasticity, lumen size and valves suit their roles in circulation. Questions compare pressure and blood flow in each vessel and distinguish pulmonary vessels, which carry blood to and from the lungs, from systemic vessels.
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