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Muscular 05 Jackie Hernandez P.5 - Coggle Diagram
Muscular 05 Jackie Hernandez P.5
Neuromuscular Junction
Sacromere
Action potential in a muscle fiber
starts when a signal is made in the nervous system
action potential= impulse that travels through a motor nerve
muscle contracts which activates nerves of muscles
muscle coverings
skeletal
Endomysium
perimysium
major functions of the muscular system
cardiac
pumps heart
Smooth
Movement of viscera,vasoconstriction+ perstalsis
Skeletal
movement of joints and maintenance of posture
3 Types of muscular functions
Sliding Filament of muscle contraction
Sacroplasmic Reticulum
releases stored calcium to the cytosol
Motor neuron
sends signals containing vesicles and acetylcholine from the brain
Vesicles
release acetylcholine to the T-Tubules
Actin Myofilament
Actin forms a crossing bridge when calcium is released and binds to a actin myofilament structure
Cross-bridge
when myosin attaches to the binding site on the actin filament
ATP
relies on cellular respiration
releases energy from muscle fibers
T-Tubule
carries acetylcholine down to the sacroplasm
Myosin
consists of two twist strands
thick filament
Acetylcholine
produced in motor neuron
neurotransmitter for skeletal muscle
stored in synaptic vesicles
Muscles
Facial Muscles