Transcribed Image Text: Seconds Put the steps of excitation-contraction in order: 1 Myosin “heads” pivot, cause [ Choose ] Calcium is taken back up and the muscle relaxes Action potential

Transcribed Image Text: Seconds
Put the steps of excitation-contraction in order:
1
Myosin “heads” pivot, cause
[ Choose ]
Calcium is taken back up and the muscle relaxes
Action potential triggers Ca2+ release from sarcoplasmic reticulum
ACh produces large EPSP in muscle fiber
4
Muscle contracts
Binding of Ca2+ to troponin causes myosin to bind to actin
5.
EPSP evokes muscle action potential
Alpha motor neurons release ACh
Myosin “heads” pivot, cause filaments to walk along filament
7
[ Choose )
8.
[Choose ]

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