The fluid in the sarcoplasmic reticulum contains a high concentration of ___________ions, which are released by the stimulation of an action potential.
A) calcium
B) sodium
C) phosphorus
D) potassium
E) iron

Question

Quizplus · Accepted Answer

The sarcoplasmic reticulum in muscle cells stores a high concentration of calcium ions (Ca2+), which are released into the cytosol when the muscle cell is stimulated by an action potential, initiating muscle contraction.

The Fluid in the Sarcoplasmic Reticulum Contains a High Concentration