If We Excite a Motor Neuron to Fire an Action

question 10

Multiple Choice

If we excite a motor neuron to fire an action potential in the presence of EGTA to complex all of the Ca²⁺

• A) Acetylcholine release will be reduced and the EPP will be reduced, but the muscle will
• contract
• B) Neurotransmission will be unaffected but contraction will be blocked because it requires Ca²⁺
• C) Neurotransmission will be blocked and so there will be no contraction
• D) Neurotransmission block can be overcome by repetitive stimulation
• E) The neuron cannot fire an action potential in the absence of Ca²⁺

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