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Mucles

Muscles

QuestionAnswer
sarcomeres actin and myosin myofilaments form highly ordered units
motor unit a single motor neuron and all the skeletal muscle fibers it innervates
presynaptic terminal enlarged nerve terminal
synaptic cleft space between the presynaptic terminal and the muscle cell
postsynaptic terminal muscle fiber
synaptic vesicles diffuses across the synaptic cleft
acetylcholine neurotransmitter
resting membrane potential charge difference across the membrane
motor neurons nerve cells that carry action potentials to skeletal muscle fibers
acetylcholinesterase enzyme
recruitment increase in number of motor units being activated
ATP adenosine triphosphate
ADP adenosine diphosphate
tetany muscle remains contracted without relaxing
lag phase time between application of a stimulus to a motor neuron and beginning of contraction
contraction phase time of contraction
relaxation phase time during which the muscle relaxes
Created by: haleighkuhn13
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