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ycow [4]
3 years ago
13

Do the proteins or the spaces change size during contraction explain your answer

Medicine
1 answer:
IrinaK [193]3 years ago
4 0
An action potential in the motor neuron causes ACh to be released into the synaptic cleft. Binding of ACh to sarcolemma receptors initiates graded potentials. How does the shape change of these proteins lead to contraction? ... Myosin heads bind to the newly exposed myosin-binding sites on actin to form cross bridges.
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