What Happens When an Action Potential Reaches the Presynaptic Terminal

question 254

Multiple Choice

What happens when an action potential reaches the presynaptic terminal of the motor neuron?

• A) Calcium is released inside the muscle fibre.
• B) Acetylcholine is released into the synaptic cleft.
• C) Acetylcholinesterase is released into the synaptic cleft.
• D) Physical contact between the motor neuron and the muscle fibre occurs.

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