Which structure in the muscle cell stores calcium?
A) sarcoplasmic reticulum
B) sarcolemma
C) transverse tubules
D) myofibril

Question

Quizplus · Accepted Answer

The sarcoplasmic reticulum is a specialized organelle in muscle cells that stores calcium ions. When a muscle cell is stimulated, calcium ions are released from the sarcoplasmic reticulum, which triggers the contraction of the muscle cell. Choice B (sarcolemma) refers to the cell membrane of a muscle cell, choice C (transverse tubules) are membranous structures that help transmit signals for muscle contraction, and choice D (myofibrils) are the contractile units of muscle cells.

Which Structure in the Muscle Cell Stores Calcium