postlab - Sabrina Lalley Lab#4 Postlab C 1 During the...

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Sabrina Lalley Lab #4 Postlab C 1. During the process of muscular contraction the action potential travels down the axon terminal rapidly which then result in the voltage gated calcium ion channels to open. This then allows the calcium to travel down the rest of the axon terminal. The calcium in the cytoplasm activates proteins that lead to the fusion of synaptic vesicles to form and for acetylcholine to come in and dock at the end of the axon terminal on the motor end plate. This then leads to the production of a depolarization and action potentials along the sarcolemma. Then to the T-tubules to open the calcium ion channels. Calcium diffuses out and binds to troponin and stimulates contraction, causing a power stroke. A power stroke would be after the myosin head binds to the actin to form the cross bridge and when the thin filament slides over the thick filament. 2. The cross bridge cycle begins when action potential releases calcium ions that flood into the cytosol and bind to tropoin that triggers the exposure of the binding sites of actin. The binding of myosin to actin happen and the power stroke causes filaments to slide and
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postlab - Sabrina Lalley Lab#4 Postlab C 1 During the...

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