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.

Question

Quizplus · Accepted Answer

The resting potential of a cardiac cell, like other cells, is primarily maintained by a higher concentration of potassium ions inside the cell and sodium ions outside the cell. This gradient is crucial for the cell's ability to generate action potentials, which are necessary for cardiac muscle contraction.

For a Resting Potential in a Cardiac Cell to Exist