During an Action Potential in Muscle,

Question

During an action potential in muscle, .
A) both Na+ and K+ diffuse out of the cell
B) Na+ diffuses into the cell, then K+ diffuses out
C) K+ diffuses into the cell, then Na+ diffuses out
D) both Na+ and K+ diffuse into the cell

Accepted Answer

During an action potential in muscle cells, sodium ions (Na+) initially diffuse into the cell, causing depolarization. Subsequently, potassium ions (K+) diffuse out of the cell, leading to repolarization. This sequence of events is crucial for the propagation of action potentials.