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Muscle cells, Muscle cells, Skeletal Muscle - Coggle Diagram
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Muscle cells
Motor units
A group of muscle fibers that all get their signals from the same, single motor neuron.
In a big power-generating muscle, each of a thousand motor neurons may synapse with and innervate a thousand muscle fibres to form a larger motor unit.
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Three phases: Latent period, period of contraction and relaxation period
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Muscles never push, they always pull
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Whatever one muscle does, another muscle can undo
- Prime moves 2. Antagonists 3. Synergists 4. Fixators
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Size principle
The more motor units recruited, the greater the force that is generated
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Skeletal Muscle
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Supportive Sheaths: Epimysium, perimysium, endomusium
Rules: 1. Proteins like to change shape when stuff binds to them 2. Changing shapes can allow proteins to bind or unbind with other stuff
Sarcomere: Contain 2 active proteins of actin and myosin, thin actin strands and thick action strands, in a z-shape and contract brings together, when muscle are resting, actin and myosin do not touch