Question

multiple choice question
calcium for muscle contraction is stored in the ______.
o mitochondria
o sarcomere
o transverse tubule
o sarcoplasmic reticulum

Explanation:

The sarcoplasmic reticulum is a specialized endoplasmic - reticulum in muscle cells that stores and releases calcium ions which are crucial for muscle contraction. Mitochondria are for energy production, the sarcomere is the basic unit of muscle contraction but not the calcium - storage site, and transverse tubules are involved in transmitting electrical signals for muscle contraction but do not store calcium.

Answer:

sarcomere: False
mitochondria: False
transverse tubule: False
sarcoplasmic reticulum: True