Question

The long plateau phase of the cardiac muscle action potential is due to Group of answer choices increased membrane permeability to sodium ions. calcium channels remaining open. movement of fewer sodium ions across the cell membrane. decrease in the amount of calcium diffusing across the membrane. increased membrane permeability to potassium ion.

Answer 1

Answer:

The plateau is caused by the movement of fewer sodium ions across the cell membrane.

Explanation:

The long plateau phase is due to the movement of calcium across the membrane.