myosin Calcium will bind to the of the thin filaments. tropomyosin sarcoplasm Ex

Question

myosin Calcium will bind to the of the thin filaments. tropomyosin sarcoplasm Excitation-contraction coupling refers to the events that link the action potentials on the sarcolemma to activation of the synaptic Action potentials then open voltage ion gates in the calcium from the SR into the cytosol. troponin releasing ons First a wave of action potentials spread from the end plate in all directions, reaching the T-tubules and then the sarcolemma actin Other active sites are open for contraction. heads to bind and continue the myofilaments T-tubules Reset

Explanation / Answer

Ans-1-Excitation-contraction coupling refers to the events that link the action potentials on the sarcolemma to activation of the myofilaments

2-First, a wave of action potentials spread from the end plate in all directions, reaching the T-tubules and then the sarcoplasm.

3-Action potentials then open voltage ion gates in the T tubules releasing calcium from the SR into the cytosol.

4-Calcium will bind to the troponin of the thin filaments.

5-Other active sites are open for myosin heads to bind and continue the contraction.

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