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Skeletal muscle (Terminology (Muscle cell = Muscle fibre, Cell membrane =…
Skeletal muscle
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Classification
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Oxidative
Oxidative phosphorylation
Half diameter of white muscle
Red (lots of myoglobin)
Lots of mitochondria
More blood vessels
Movement
Attached to bones
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Origin remains stationary, insertion moves when muscle contracts to move bone
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Neuromuscular junction
Events
AP down somatic motor neuron --> Secrete AcH --> Depolarised membrane --> Depolarisation conducted down T-tubules --> Stimulate release of Ca2+ from SR
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Meat
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Tenderness depends on
Intramuscular fat, amount of connective tissue, bonds between myofilaments, length of storage/use of enzymes
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