A presynaptic receptor that is activated by neurotransmitters that are different from those released from the axon terminal is termed a(n) ____.

Question

Quizplus · Accepted Answer

Heteroceptors are presynaptic receptors that respond to neurotransmitters or neuromodulators that are different from the neurotransmitter released by the neuron itself. This contrasts with autoreceptors, which respond to the same neurotransmitter that the neuron releases. Ionotropic and metabotropic receptors refer to the mechanism of action (ion channel opening or G-protein coupled, respectively), not the specificity of neurotransmitter interaction.

A Presynaptic Receptor That Is Activated by Neurotransmitters That Are