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a motor unit typically includes on ___and several____

motor neuron, muscle fibers

the electrical impulses that triggers a contraction travels deep into a skeletal muscle fiber by means of

nerve pathways

neurotransmitter molecules are stored in vesicles within

motor neuron axons

the enzyme acetlycholineesterase causes acetycholine to

decompose

creatine phosphate supplies energy for the ____of ATP

production

binding sites on the surface of actin allow the formation of cross bridges with molecules of

myosin

the amount of oxygen needed to support the conversion of lactic acid to glucose by the liver is called the

oxygen debt

a muscle cramp is most likely due to a temporary lack of

ATP

the characteristic reddish brown color of skeletal muscle comes from which substance

hemoglobin

the threshold stimulus is the

certain strenght of stimulation

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