QUESTION 3 6 points In excitation-contraction coupling, an action potential from

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QUESTION 3 6 points In excitation-contraction coupling, an action potential from a motor neuron arrives at the junction stimulating the entry of sodium into the muscle and a muscle action potential travels along the sarcolemma and the tubules causing the release of reticulum. That binds to the move and unmask the can occur. When the excitation ends, the sarcoplasmic reticulum takes the from the sarcoplasmic molecule causing tropomyosin to binding site on actin so that contraction (same answer as the third blank) back up and the muscle relaxes Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers Save

Explanation / Answer

1.axon terminal junction.

2.T- tubules.

3.calcium ions.

4.troponin.

5.myosin binding sites.

6.Calcium ions back., and it binds to troponin causing change in its shape.

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