NASM 4th Edition: Chapter 2- Figure 2.38 Excitation-Contraction Coupling
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each of the black spaces below before clicking
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| ACH released to binding receptors, | Steps in the initiation of a contraction:
Step 1
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| Action reaches T tubule | Steps in the initiation of a contraction:
Step 2
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| sacroplasmic reticulum releases CA2t | Steps in the initiation of a contraction:
Step 3
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| active site exposure cross-bridge binding (actin and myosin overlap), | Steps in the initiation of a contraction:
Step 4
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| z lines get shorter, contraction begins | Steps in the initiation of a contraction:
Step 5
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| ACH removed by ACHE, | Steps that end the contraction:
Step 1
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| sarcoplasmic reticulum recaptures CA2t, | Steps that end the contraction:
Step 2
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| active site covered, so there is no cross bridge interaction between actin and myosin, | Steps that end the contraction:
Step 3
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| contraction ends, | Steps that end the contraction:
Step 4
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| relaxation occurs passive return to resting length | Steps that end the contraction:
Step 5
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