The long plateau in the action potential observed in cardiac muscle cells is probably related with ________ staying longer in the cytoplasm.

A) Na⁺
B) K⁺
C) Ca²⁺
D) Cl⁻
E) Na⁺, K⁺, and Ca²⁺

Plateau

A state of little or no change following a period of activity or progress, often used in contexts like physical fitness, learning, and growth curves.

Cytoplasm

The jelly-like substance within a cell, excluding the nucleus, containing organelles, where various cellular processes occur.

Action Potential

A rapid, temporary change in the electrical charge of a neuron's membrane, facilitating the transmission of signals.