Suppose a Particular Neurotransmitter Causes an IPSP in Postsynaptic Cell

question 22

Multiple Choice

Suppose a particular neurotransmitter causes an IPSP in postsynaptic cell X and an EPSP in postsynaptic cell Y. A likely explanation is that

• A) the threshold value in the postsynaptic membrane is different for cell X and cell Y.
• B) the axon of cell X is myelinated, but that of cell Y is not.
• C) only cell Y produces an enzyme that terminates the activity of the neurotransmitter.
• D) cells X and Y express different receptor molecules for this particular neurotransmitter.

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