Examlex
Which of the following is TRUE?
P Wave
First complex of the electrocardiogram representing depolarization of the atria.
Atrial Depolarization
The electrical activation of the atria of the heart, leading to atrial contraction and the initiation of the heartbeat.
Atrial Repolarization
The process of the heart's atrial muscle cells returning to their resting state after contraction, typically hidden in an EKG by the ventricular depolarization wave.
Threshold
The minimum level of stimulation required to trigger a neural impulse or a response in a sensory system.
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