Communication between neurons and skeletal muscle fibers occurs at specialized junctions called neuromuscular junctions.

Cross bridges are formed by the actin molecules.

During the recovery period after exercise, the body's need for oxygen is increased.

In isotonic contractions, the muscle changes in length and the tension remains constant through most of the contractile period.

Lactic acid is an end product of anaerobic fermentation that contributes to muscle fatigue.

Muscles that exert very fine control (such as the muscles controlling movements of the fingers and eyes) have large motor units.

One of the functions of the smooth muscle tissue is to force blood from the heart into the major arteries.

The area of the sarcomere that contains only thin and elastic filaments is the I band.

The neurotransmitter that stimulates skeletal muscle is acetylcholine.

The sequence of events that forms the link between electrical activity in the sarcolemma and the initiation of a contraction is called excitation-contraction coupling.

The skeletal muscle complex known as the triad consists of the transverse tubule and the terminal cisternae.

The space between the neuron and the muscle is the axon terminal.

The type of muscle fiber that is most resistant to fatigue is the fast fiber.

Thick filaments consist mainly of the protein actin.

Cross bridges occur when myosin heads combine with the binding sites on actin.

Cross bridge attachment to actin requires K⁺.

In the initial stages of repolarization, the ionic conditions are restored, returning the membrane to its resting potential.

Ca⁺⁺ is essential for skeletal muscle contraction.

Subthreshold stimuli result in only a small amount of muscle response movement.

At maximal stimulus, the muscle is contracting at full strength and all motor units are recruited.