Step 1 - There are few or no electrical impulses reaching the muscles, Step 2 - There is a large increase in electrical impulses sent from the brain, Step 3 - Sarcoplasmic reticulum released CA+, Step 4 - Acetylcholine travels across the synaptic cleft to the myofibril, Step 5 - Myosin cross-bridges attach to actin, Step 6 - Actin is pulled and slides over the myosin and the muscles shorten or contracts, Step 7 - The nerve impulse stops and CA+ is taken back into the sarcoplasmic reticulum, Step 8 - The muscle is no longer contracting,

Steps of the Sliding filament theory

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