Natural substances that function as neurotransmitters in the brain and are similar in their effects to morphine are ______.
A) catecholamines
B) neuroleptics
C) endorphins
D) antigens

Question

Quizplus · Accepted Answer

Endorphins are natural substances that act as neurotransmitters in the brain and have similar effects to morphine. Catecholamines are a class of neurotransmitters that include dopamine, norepinephrine, and epinephrine, but they do not have the same pain-relieving effects as endorphins. Neuroleptics are a class of antipsychotic medications that block dopamine receptors in the brain. Antigens are foreign substances that stimulate an immune response.

Natural Substances That Function as Neurotransmitters in the Brain and Are