Which of the Following Is True

question 117

Multiple Choice

Which of the following is true?

• A)Blood enters the right and left atria only during diastole.
• B)Most ventricular filling occurs before the atria contract.
• C)During ventricular systole,the AV valves open.
• D)The semilunar valves remain closed throughout ventricular systole.
• E)Most of end-diastolic volume comes from active filling.

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