Body Fluids and Circulation · NEET Preparation Zoology
During joint diastole of the cardiac cycle, which of the following events does NOT occur?
Practice question from Body Fluids and Circulation (NEET Preparation Zoology), with the correct answer and a step-by-step solution.
medium · MCQ · Q-454CFC
During joint diastole of the cardiac cycle, which of the following events does NOT occur?
- A.All four chambers of the heart are in a relaxed state
- B.Bicuspid and tricuspid valves remain open
- C.Semilunar valves remain openCorrect answer
- D.Blood flows passively from vena cava and pulmonary veins into the ventricles
Solution
During joint diastole, the ventricles are relaxed, so the semilunar valves (aortic and pulmonary) are closed to prevent backflow of blood, while the AV valves are open.
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