The smooth ER that stores calcium ions in muscle fibers is the
A)sarcolemma.
B)sarcoplasm.
C)T tubules.
D)sarcoplasmic reticulum.

Question

Quizplus · Accepted Answer

The smooth endoplasmic reticulum in muscle fibers that stores calcium ions is known as the sarcoplasmic reticulum. The sarcolemma is the cell membrane of a muscle fiber. The sarcoplasm is the cytoplasm of a muscle fiber. T-tubules are invaginations of the sarcolemma that allow for the rapid spread of action potentials throughout the muscle fiber.

The Smooth ER That Stores Calcium Ions in Muscle Fibers