In skeletal and cardiac muscles, relaxation occurs as____________ ions are pumped back into the sarcoplasmic reticulum.
A) potassium
B) chloride
C) sodium
D) calcium

Question

Quizplus · Accepted Answer

Calcium ions are actively pumped back into the sarcoplasmic reticulum during muscle relaxation, which decreases the calcium ion concentration in the cytoplasm, leading to muscle relaxation.

In Skeletal and Cardiac Muscles, Relaxation Occurs As____________ Ions Are