When caring for a client with dysfunction in the conduction system, at which period would the nurse note that cells are resistant to stimulation?
A) During polarization
B) During depolarization
C) During repolarization
D) During the refractory period
D
Feedback:
The refractory period is the time when cells are resistant to electrical stimulation. Repolarization is when the ions realign themselves to wait for an electrical signal. Depolarization occurs during muscle contraction when positive ions move inside the myocardial cell membrane and negative ions move outside. Before an impulse is generated, the cells are in a polarized state.
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