Which of the Following Statements Are True of the Valves

question 200

Multiple Choice

Which of the following statements are true of the valves of the heart? (Read carefully and select all of the correct statements.)

• A)The pulmonary and aortic valves are important to prevent backflow of blood when the ventricles contract.
• B)The right and left AV valves are important to prevent backflow of blood when the ventricles relax.
• C)The pulmonary and aortic semilunar valves prevent backflow of blood from arteries to ventricles.
• D)The edges of the semilunar valves are anchored by the chordae tendineae and papillary muscles.
• E)The right and left AV valves prevent backflow of blood from atria to ventricles.
• F)The valve openings are kept from stretching by the fibrous skeleton of the heart.

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Definitions:

MP Schedule

Marginal Product Schedule, a table or graph showing how the marginal product changes as the quantity of a variable input changes.

Cost-Minimizing Equilibrium

An economic situation where a firm operates at the lowest possible cost to produce its output.

Total Product

Total product is the overall quantity of output that a firm produces, usually within a specified period, based on variable inputs.

Marginal Product

Marginal product refers to the additional output that is produced by employing one more unit of a particular input, holding other inputs constant.