Heroin binds to receptors on neurons that travel from the spinal cord to the region of the brain that feels pleasure. These receptors are normally meant for

A) epinephrine.
B) norepinephrine.
C) dopamine.
D) endorphins.
E) acetylcholine.

Endorphins

Peptides produced by the central nervous system and the pituitary gland, known for their ability to act as natural painkillers.

Heroin

An opioid drug made from morphine, a natural substance taken from the seed pod of various opium poppy plants.

Neurons

Electrically excitable cells that communicate with other cells via specialized connections called synapses, functioning as the basic working unit of the brain.