Which of the following is the correct sequence of events for muscle contractions

Question

Which of the following is the correct sequence of events for muscle contractions?

motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke, sliding of myofilaments

neurotransmitter release, muscle cell action potential, motor neuron action potential, release of calcium ions from SR, sliding of myofilaments,  ATP-driven power stroke

muscle cell action potential, neurotransmitter release, ATP-driven power stroke, calcium ion release from SR, sliding of myofilaments

neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke

Explanation / Answer

Correct sequence of muscle contraction:

Motor neuron action potential, neurotransmitter release, muscle cell action potential, release of ca ions from SR , AT driven power stroke, sliding of myofilaments.

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