Depolarization (contraction phase)

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6 Terms

1
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step 1

Nerve impulse moves to end of nerve, opens calcium channels

2
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step 2

calcium flows into nerves releasing aceryl choline (ACH) into synaptic cleft

3
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step 3

Aceryl Choline (ACH) binds to receptors on the muscle opening Na+ (sodium) channels

4
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step 4

NA+ uses the t- tibules to flow deep into muscle, until it reaches sarcoplasmic recticulum. (ca2+ storage)

5
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step 5

Sarcoplasmic recticulum releases ca+2 onto sarcomere

6
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step 6

Ca2+ activates cross-bridges on myosin to bind actin and shorten the sarcomere