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ch 8

roles of other body systems in movement and motor unit

QuestionAnswer
most st muscles cause movements by pulling on bones across moveable joints
systems that play essential roles in movement respiratory, circulatory, nervous, muscular, and skeletal
bones are like levers
muscles move bones/ pull levers (bones)
motor unit combo of motor neuron and muscle fiber it controls nervous system to control muscle contraction
motor neuron specialized nerve that transmits an impulse to a muscle, causing contraction
neuromuscular junction (NMJ) point of contact between a nerve ending and muscle fiber
before a muscle can contract and produce movement, stimulation of muscle by nerve impulse is required before a muscle can contract and produce movement/
motor unit recruitment nervous system activates additional motor units to increase muscle force
Created by: b.marshall
 

 



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