How do excitatory and inhibitory neurotransmitters have their opposite effects?

Question

How do excitatory and inhibitory neurotransmitters have their opposite effects?

A. Inhibitory neurotransmitters and excitatory neurotransmitters act on the same neurotransmitter-gated ion channels, but the excitatory neurotransmitters open the channels and the inhibitory neurotransmitters block them.

B. Inhibitory neurotransmitters have their effect by blocking release of excitatory neurotransmitters from the presynaptic terminal.

C. Inhibitory neurotransmitters open transmitter-gated ion channels that are permeable to negatively charged ions, while excitatory neurotransmitters open transmitter-gated ion channels that are permeable to positively charged ions.

D. All of the above are correct

Explanation / Answer

Ans). B. Inhibitory neurotransmitters have their effect by blocking release of excitatory neurotransmitters from the presynaptic terminal.

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