steps of contractility

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5 Terms

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step 1.

new AP travels down length of muscle cell

2
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step 2

New AP causes sarcoplasmic reticulum to release stored calcium

3
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step 3

calcium causes exposure of active binding sites on actin

4
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step 4

myosin heads bind to actin to perform: bind→ ratchet→ forward→release→ repeat (sliding filament theory)

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step 5

contraction