When a motor neuron stimulates a group of muscle fibers, the neuron and all the fibers together all called

minimum voltage needed for a muscle fiber to contract

The nervous system responds to the various demands places on muscle in two ways; Altering the frequency of the stumulus and altering the intensity of the stimulus

Then a muscle contracts several times in a row, the last contraction will be stronger than the first contraction,

condition of rapid muscle contraction with only partial relaxation

condition in which impulses arrive so fast the muscle cannot relax between stimuli and twitches merge into one prolonged contraction

continuous state of partial muscle contraction that allows for the maintenance of posture

In general stronger stimulus intensity = stronger contractions

Stimulus that excites all fibers in the nerve

process that calls on increasing numbers of neurons to stimulate fibers

muscle contraction that often shortens the muscle

Muscles contract by increasing tension while the muscle remains the same

At rest , muscles obtain most of their energy by metabolizing fatty acids. using aerobic respiration

End of the muscle that attaches to the more movable bone

The compound that's broken down when the supply of oxygen and there's not enough ATP

Anaerobic fermentation of glucose generations energy quickly but it produces a byproduct that leads to muscle fatigue