Which of the Following Manipulations Would Reduce the Release of Neurotransmitter

question 23

Multiple Choice

Which of the following manipulations would reduce the release of neurotransmitter from a presynaptic neuron terminal?

• A) addition of tetrodotoxin to the extracellular fluid at the axon terminal
• B) increase in extracellular sodium and potassium ion concentrations at the axon terminal
• C) reduction in extracellular calcium ion concentration at the axon terminal
• D) All of the above manipulations would reduce the release of neurotransmitter.