Chpt 10 anatomy part 2

The strength of a contraction depends on the length of the muscle fiber prior to contraction

• true

• false

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

• motor unit

• threshold

• twitch

minimum voltage needed for a muscle fiber to contract

• threshold

• twitch

• resting length

• tetanus

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

• true

• false

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

• twitch

• incomplete tetanus

• treppe

• complete tetanus

condition of rapid muscle contraction with only partial relaxation

• twitch

• treppe

• incomplete tetanus

• complete tetanus

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

• twitch

• incomplete tetanus

• complete tetanus

• treppe

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

• treppe

• complete tetanus

• incomplete tetnaus

• muscle tone

In general stronger stimulus intensity = stronger contractions

• true

• false

Stimulus that excites all fibers in the nerve

• strong stimulus

• weak stimulus

• recruitment