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Unformatted text preview: potentials. 2) ACh bound to the receptors dissociates and no longer activates the receptor. 3) Acetylcholinesterase in the synaptic cleft removes any remaining ACh so the ACh receptors are no longer activated. 4) Calcium released from the SR during contraction is actively pumped back into the SR which results in the troponin-tropomyosin complex recovering the active sites on actin. The muscle fiber returns to its resting length due to elasticity (and/or contraction of antagonistic muscles that cause the contracted muscle to be stretched)....
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.
- Fall '10