Depolarization of a Cardiac Muscle Cell Occurs as the Result

question 1

Multiple Choice

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.

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