Which part of the cross-bridge cycle is called the power stroke?

True or false: if false, choose the answer that best corrects the statement:

The motor neuron is in contact with the sarcolemma in order to efficiently pass the electrical signal to the muscle fiber.

Voltage gated channels respond to the depolarization of an action potential by releasing Ca$^2$$^+$. Where are these channels located?

How does tropomyosin regulate muscle contraction?

In a skeletal muscle fiber, which structure would you expect to have the greatest total surface area?

What would happen if a muscle completely ran out of ATP during a muscle contraction.