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Unit 4: Muscular

Anatomy Unit 4

TermDefinition
Tendon fibrous tissue that connects muscle to bone
Myosin protein that causes muscle contraction and relaxation (thick filament
Actin protein that causes muscle contraction and relaxation (thin filament)
Sarcomeres structural and functional unit of a myofibril
Neurotransmitters chemical that stimulates muscle fiber to contract
Threshold Stimulus stimulus level that must be exceeded to elicit a nerve impulse
Refractory Period time period following stimulation; no response to stimuli
Myofibrils contractile fibers within muscle cells
Fascia fibrous connective tissue that encloses a muscle
Twitch brief muscle contraction followed by relaxation
Motor Neuron transmit impulses from the CNS to an effector
Synaptic Cleft a narrrow space between pre and post neurons
Origin end of a muscle attached to a relatively immovable part
Insertion end of a muscle attached to a moveable part
Created by: Sophieuhrine
 

 



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