The period of time in which cardiac muscle cells are insensitive to further stimulation is called the

A) absolute refractory period.
B) hyperpolarization period.
C) AV period.
D) SA period.
E) ectopic focus.

Absolute Refractory Period

Portion of the action potential during which the membrane is insensitive to all stimuli, regardless of their strength.

Cardiac Muscle Cells

Specialized muscle cells in the heart responsible for generating the force to pump blood throughout the body.

Hyperpolarization Period

A phase following the action potential in neurons where the inside of the cell becomes more negatively charged than the resting potential.