There are several types of neurotransmitters that our body can produce that are similar to morphine. Our brain can produce naturally occurring opiates. These Endorphins are morphine-like chemicals that help reduce pain while stimulating positive feelings.
The correct answer is C. (Endorphins). Endorphin is short for endogenous morphine which means that it is produced by our bodies. This drug lessens the feeling of pain as well as makes us feel good similar to morphine, which is an opiate drug.