After contraction, with no more action potentials, Ca2+ is actively transported back into the sarcoplasmic reticulum using ATP. This causes tropomyosin to cover actin's binding sites, preventing further cross-bridge formation and relaxing the muscle.
- no further action potential at sarcoplasmic reticulum - Ca2+ actively transported back into sarcoplasmic reticulum - using ATP produced by mitochondria in respiration - Ca2+ detaches form Ca2+ receptors on tropomysosin - tropomyosin covers binding sites on actin - myosin heads can no longer bind - cross-bridges can no longer form
| Front | What happens after muscle contraction? |
|---|---|
| Back | - no further action potential at sarcoplasmic reticulum - Ca2+ actively transported back into sarcoplasmic reticulum - using ATP produced by mitochondria in respiration - Ca2+ detaches form Ca2+ receptors on tropomysosin - tropomyosin covers binding sites on actin - myosin heads can no longer bind - cross-bridges can no longer form |
Tags: muscles
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