What is happening during the latent period of a muscle twitch?
A) The muscle relaxes and returns to its former length.
B) Fresh ATP binds to the myosin, causing it to return to its resting position.
C) ADP and phosphate are released, and the power stroke of the contraction occurs.
D) The myosin-actin cross-bridges are broken and the sarcomere shortens.
E) The neurotransmitter is diffusing across the synaptic cleft, causing an electrical signal in the muscle cell.

Question

Quizplus · Accepted Answer

The latent period is the time between stimulation and initiation of contraction. During this time, the events that begin muscle contraction are occurring; acetylcholine diffuses across the synaptic cleft, causing an electrical signal to spread across the sarcolemma and down the T tubules.

What Is Happening During the Latent Period of a Muscle