Chemical messengers that often travel in the blood supply in order to affect target neurons that are quite distant are known as
a. neurotransmitters.
b. neuromodulators.
c. neurohormones.
d. neuroenzymes.
Question 2
This chemical is released from a neuron and diffuses away to influence neurons somewhat distant from the releasing neuron. The chemical is a(n)
a. neurotransmitter.
b. neuromodulator.
c. neurohormone.
d. enzyme.
