Which of the following pairs concerning action potentials in cardiac muscle is mismatched?

A) Opening of Na⁺ channels - depolarization
B) Closing of Ca²⁺ channels - plateau phase
C) Opening of K⁺ channels - rapid repolarization
D) Closure of Na⁺ channels - early repolarization
E) Opening of Ca²⁺ channels - plateau phase

Action Potentials

The process by which neurons transmit electrical impulses along their axons.

Na+ Channels

Ion channels that allow sodium ions to flow across cell membranes, crucial for the propagation of electrical signals in nerves.

Ca2+ Channels

Cellular structures that allow the flow of calcium ions (Ca2+) into or out of a cell, playing crucial roles in various cellular processes.