For a Resting Potential in a Cardiac Cell to Exist

Multiple Choice

For a resting potential in a cardiac cell to exist, there must be an:

A) adequate number of potassium ions inside the cell and sodium ions outside the cell.
B) adequate number of sodium ions inside the cell and potassium ions outside the cell.
C) influx of calcium ions into the cell.
D) ionic equilibrium between the inside and outside of the cell.