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10 Steps of Muscle Contraction Test Questions and Answers Rated A

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Step 1 - Nerve Impulse reaches Neuromuscu- lar Junction 2. Step 2 - Acetylcholine (ACH) Released by Mo- tor Neuron 3. Step 3 - ACH binds to Muscle Receptor Sites 4. Step 4 - Sodium Chan- nels in muscle OPEN 5. Step 5 - Na+ Ion rush causes change in cell charge Nerve signal from brain arrives at neuromuscular junction & axon terminal of motor neuron Motor neuron releases neurotransmitter Acetylcholine (Ach) into synaptic gap

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10 Steps of Muscle Contraction Test Questions and Answers Rated A

1. Step 1 - Nerve Impulse Nerve signal from brain arrives at neuromuscular junction & axon terminal
reaches Neuromuscu- of motor neuron
lar Junction




2. Step 2 - Acetylcholine Motor neuron releases neurotransmitter Acetylcholine (Ach) into synaptic
(ACH) Released by Mo- gap between nerve & muscle cells
tor Neuron




3. Step 3 - ACH binds to ACH (key) binds to receptors on the muscle cell
Muscle Receptor Sites




4. Step 4 - Sodium Chan- Receptors stimulated by ACH allow sodium (Na+) channels in muscle cell
nels in muscle OPEN to open




5. Step 5 - Na+ Ion rush Na+ influx into muscle cell causes polarity change, creates electrical cur-
causes change in cell rent called an Action Potential
charge

6.

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