Question

multiple - choice question.
when a neuron releases a chemical messenger into the blood, this messenger is referred to as a ______.
neurohormone
neurotransmitter
g protein
paracrine

Explanation:

Neurohormones are chemical messengers released by neurons into the bloodstream. Neurotransmitters act across synapses. G - proteins are involved in signal - transduction pathways within cells. Paracrine signals act on nearby cells, not released into the blood by neurons.

Answer:

neurohormone