Which of the following is an important endogenous substance involved in the perception of pain?
A) serotonin
B) gamma-amino butyric acid (GABA)
C) endorphins
D) dopamine

Question

Quizplus · Accepted Answer

Endorphins are endogenous opioids that are released in response to pain and are involved in the perception of pain. They bind to opioid receptors in the brain and spinal cord, blocking the transmission of pain signals. Serotonin and dopamine are neurotransmitters that are involved in mood regulation and reward pathways, but are not directly involved in the perception of pain. GABA is an inhibitory neurotransmitter that can also modulate pain transmission, but it is not as directly involved as endorphins.

Which of the Following Is an Important Endogenous Substance Involved