What substances play a role in suppressing pain and promoting pleasure?
A) hormones
B) neurotransmitters
C) endorphins
D) serotonin

Question

Quizplus · Accepted Answer

Endorphins are neurotransmitters that are released by the brain in response to pain or stress. They have a similar chemical structure to opiates like morphine, and have been shown to play a role in suppressing pain and promoting pleasurable feelings.

Answer: B and D 
 Neurotransmitters such as serotonin are involved in regulating mood and emotions, and can also play a role in suppressing pain and promoting pleasure. However, while these neurotransmitters can have an effect on pain and pleasure, they are not specifically known for their pain-suppressing or pleasure-promoting properties in the way that endorphins are.

What Substances Play a Role in Suppressing Pain and Promoting