Which structural component houses a high concentration of Ca²⁺ and releases it to trigger muscle contraction?
A)sarcoplasmic reticulum
B)sarcomere
C)t-tubule
D)sarcolemma

Question

Quizplus · Accepted Answer

The sarcoplasmic reticulum is a membrane-bound structure within muscle fibers that stores and releases high concentrations of Ca²⁺ ions. When the muscle is stimulated by a nerve impulse, the Ca²⁺ ions are released from the sarcoplasmic reticulum into the cytoplasm, triggering muscle contraction.

Which Structural Component Houses a High Concentration of Ca²⁺ and Releases