The action potentials of pacemaker cells are due to voltage-gated _______ channels, which close more _______ than the voltage-gated Na⁺ channels of neurons and other muscle cells. A) Na⁺; slowly B) K⁺; rapidly C) Ca²⁺; slowly D) Ca²⁺; rapidly E) K⁺; slowly

Question

Quizplus · Accepted Answer

The action potentials of pacemaker cells are due to voltage-gated calcium (Ca) channels, which close more slowly than the voltage-gated Na and K channels of neurons and other muscle cells. Therefore, choice C, Ca²⁺; slowly, is the best choice.

The Action Potentials of Pacemaker Cells Are Due to Voltage-Gated