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