alleryStart learning →Name heart-muscle contraction and relaxation.
AContraction: pulse; relaxation: systole
BContraction: diastole; relaxation: pulse
CContraction: systole; relaxation: diastole
DContraction: diastole; relaxation: systole
Answer & Solution
Correct answer: C. Contraction: systole; relaxation: diastole
Systole means contraction, while diastole means relaxation of a heart chamber.
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