As the Electrical Signal Travels Through the T Tubules,it Causes

Question

As the electrical signal travels through the T tubules,it causes the
A) release of calcium from the sarcoplasmic reticulum.
B) release of the neurotransmitter ACh from the axon terminal in the neuromuscular junction.
C) inactivation of the ACh within the neuromuscular junction.
D) myosin heads to detach from the actin.

Accepted Answer

As the electrical signal travels through the T tubules, it causes depolarization of the membrane of the sarcoplasmic reticulum. This depolarization triggers the release of calcium ions from the sarcoplasmic reticulum into the sarcoplasm, which is necessary for muscle contraction to occur.