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  Identify the gray structures at the yellow arrows, which binds the red chemicals.

In this image of proteins involved in muscle contraction, the brown proteins at the red arrow represent:

Which of these best explains why skeletal muscles store glycogen?

One part of oxygen debt is the need to take in more oxygen gas after exercise to store it inside glycogen.

Which of the following attach muscle to the bone?

 In this diagram of proteins required for muscle contraction, the green ribbon-shaped protein at the red arrows represents:

The synaptic knob of a motor neuron has direct physical contact with the sarcolemma of a muscle fiber.

In skeletal muscle fibers, the thick filament proteins are called _____ and their function is to

The axon of a motor neuron that controls muscle fibers in the tibialis anterior would extend all the way from the spinal column to the lower leg.

 During the repolarization phase shown on this graph of an action potential along the sarcolemma, ______ ions are flowing rapidly out of the cell and causing the voltage to decrease.