Question 27 / 30:  What happens at the neuromuscular junction after Ach has binded to the motor end plate? (Final step of motor neuron activation.)
A  Calcium ions rush into the cytosol and bind to the troponin.
B  Impulse travels T-tubules and sarcoplasmic reticulum.
C  Myosin heads engage power stroke.
D  Calcium ions react with synaptic vesicles.
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ZOOL113 Muscular System

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