What term is used to identify the period that follows depolarization of the myocardium and rep-resents a period during which no new cardiac potential can be propagated?
a. Absolute refractory
b. Hyperpolarization
c. Resting
d. Threshold
ANS: A
A refractory period is the time during which no new cardiac action potential can be initiated by a stimulus. It follows depolarization. Neither hyperpolarization nor resting correctly identifies this period. Threshold is related to depolarization.
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