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Chapter 13

Muscular System

QuestionAnswer
Types of muscle; skeletal, cardiac, smooth
Skeletal muscle; voluntary control, striated, multinucleated; attached to skeleton so function in posture, movement
Cardiac muscle; involuntary, striated, one nucleus; found in heart
Smooth muscle; involuntary, non-striated, one nucleus; found in the interior of hollow organs
Antagonistic muscles; when one contracts, the other relaxes; biceps and triceps brachii
Sarcomere; contractile unit of muscle
Actin; thin filaments
Myosin; thick filaments
Neuromuscular junction; where motor neuron meets muscle cell
Motor neuron; neuron that stimulates muscle cells
Neurotransmitter; chemical released to stimulate muscle cells; acetylcholine
Sarcomeres shorten when; motor neuron stimulates the muscle; calcium allows binding of actin and myosin
Created by: castigisselle
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