Which event will occur when ACh binds to a receptor located on the junctional fold of a skeletal muscle? A voltage-gated calcium channel will open. A chemically (ligand) gated cation channel will open. A calcium-release channel will open. A chemically (ligand) gated anion channel will open. Which event links the excitation of a skeletal muscle to its contraction? Action potentials propagate into the interior of the skeletal muscle fiber. Calcium release from the sarcoplasmic reticulum initiates the contraction. Sodium release from the sarcoplasmic reticulum initiates the contraction.
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