Which information by the nurse indicates a good understanding of depolarization? Depolarization of a cardiac muscle cell occurs as the result of:
A) A decrease in the permeability of the cell membrane to ions
B) The rapid movement of ions across the cell membrane
C) A blockade by calcium ions
D) Stimuli instigated during the refractory period

Question

Quizplus · Accepted Answer

Depolarization is caused by the movement of electrically charged solutes (ions)across cardiac cell membranes.
Permeability must be increased for movement to occur.
A blockage of calcium ions would decrease depolarization.
No cardiac action potential can be initiated in the refractory period.

Which Information by the Nurse Indicates a Good Understanding of Depolarization