There are new nurses on the telemetry unit who have been paired with preceptors for their first 8 weeks on the unit. One new nurse asks her preceptor to explain depolarization. What would be the best answer by the preceptor?
A) "Depolarization is the mechanical contraction of the heart muscles."
B) "Depolarization is the electrical stimulation of the heart muscles."
C) "Depolarization is the electrical relaxation of the heart muscles."
D) "Depolarization is the mechanical relaxation of the heart muscles."
Ans: B
Feedback: The electrical stimulation is called depolarization, and the mechanical contraction is called systole. Electrical relaxation is called repolarization, and mechanical relaxation is called diastole. This makes options A, C, and D incorrect.
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