The Flattening of the Action Potentials of Myocardial Contractile Cells

Multiple Choice

The flattening of the action potentials of myocardial contractile cells, called the plateau phase, is due to a combination of ________ K⁺ permeability and ________ Ca²⁺ permeability.

A) increasing, increasing
B) decreasing, decreasing
C) increasing, decreasing
D) decreasing, increasing