Question

what is name given to the regularly spaced infoldings of the sarcolemma?
terminal cisternae
motor endplates
sarcoplasmic reticulum
transverse or t tubules

Explanation:

• Terminal cisternae are part of the sarcoplasmic reticulum and store calcium ions.
• Motor endplates are the part of the muscle fiber membrane that interacts with the motor neuron at the neuromuscular junction.
• The sarcoplasmic reticulum is a membrane - bound structure that stores and releases calcium ions in muscle cells.
• Transverse or T tubules are invaginations (infoldings) of the sarcolemma (muscle cell membrane) that help in the rapid transmission of the action potential deep into the muscle fiber.

Answer:

transverse or T tubules