bio chpt 9

what is a a single stimulus-contraction- relaxation sequence in a muscle fiber

depending on what factors can a muscle twitch vary

what can be viewed on a myogram

what are the three phases of a muscle twitch

what twitch phase has action potential that sweeps across sarcolemma

what twitch phase has SR release of calcium ions

what twitch phase has contraction cycle has not begun

what twitch phase has tension rises to peak

what twitch phase has calcium binds to troponin allowing cross-bridge formation between myosin head and active site on actin

what twitch phase has calcium levels fall

what twitch phase has active sites covered by tropomyosin

what twitch phase has number of cross-bridges decline with detachment

What are the two factors determining the amount of tension produced by a skeletal muscle

what effects of stimulation frequency on tension stimulate of skeletal muscle fiber immediately after relaxation phase produces increasing maximum tension

what effects of stimulation frequency on tension continues for the first 30-50 stiumulations

what effects of stimulation frequency on tension is in most skeletal muscles do not demonstrate this

what effects of stimulation frequency on tension is a stiumulation of skeletal muscle fibers before relaxation phase completion produces increasing maximum tension

what effects of stimulation frequency on tension have duration of twitch determines maximum time avaliable to produce this

what effects of stimulation frequency on tension is convulsive tension and wave summation producing almost peak tension

what effects of stimulation frequency on tension  has wave summation where stimulation frequency eliminates relaxation phase and produces peak tension

what effects of stimulation frequency on tension seldomly occurs in normal functioning muscles

what is a group of muscle fibers called

the size of this varies with muscle control

what motor unit has movements begin with the smallest motor units

what motor unit as movement continues, more and larger motor units are stimulated to contribute producing greater tension

what motor unit is activated on a rotating basis to maintain a sustained contraction

what motor unit has variable number of motor units always active to produce low level tension

what motor unit is regulated at subconscious level

what motor unit activated muscle fibers use energy and therefore can affect metabolism by a small amount