The period of contraction of the heart muscle when blood is ejected from the atria into the ventricles, and from the ventricles into the arteries, is called:
A) diastole.
B) conductivity.
C) repolarization.
D) systole.
Ans: D
Feedback:
Contraction of the atria and the ventricles is called systole. Diastole refers to the period of time between heart contractions. Conductivity refers to the ability of the heart to contract. Repolarization refers to the return of ionic concentrations to conditions prior to contraction.
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