State whether the following statements are true or false. During the refractory period between ventricular contraction and atrial contraction, the heart is in diastole.
A
True
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B
False
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Solution
The correct option is A True Diastole is the part of the cardiac cycle when heart refills with blood following systole. It is 0.4 seconds in duration. All the four chambers of the heart are in diastole.