Question

which neurotransmitter is altered through the use of lsd (lysergic acid diethylamide)?
serotonin
norepinephrine
epinephrine
dopamine

Explanation:

LSD (lysergic acid diethylamide) is a hallucinogenic drug. It acts on the serotonin system in the brain. Serotonin is a neurotransmitter that plays a role in mood, perception, and other functions. LSD binds to serotonin receptors (specifically 5 - HT₂A receptors) and alters serotonin's normal functioning. Norepinephrine is involved in the body's "fight - or - flight" response. Epinephrine (adrenaline) also has roles in the stress response. Dopamine is associated with reward, motivation, and movement. But LSD's main effect is on serotonin.

Answer:

serotonin