Biology Help Practice for Lab

Hi Jake Johnson

Stimulants:


Depressants:

There are many different chemicals/alkaloids that act as stimulants and depressants on our body. Nicotine, a stimulant found in the tobacco plant is one of them. When nicotine is first introduced into the blood stream, the nicotine causes the body to release the hormone epinephrine. Epinephrine activates the sympathetic nervous system, making breathing become rapid and shallow, heart rate increases, and blood pressure rises. LSD or lysergic acid diethylamide is a stimulate working on the central nervous system by mimicking serotonin in our brains. It inhibits the neurotransmitters and stimulates the transmissions, which then give it its effects of euphoria and increased heart rate as well as increased blood pressure. Depressant drugs lower neurotransmission levels, which depress or reduce stimulation, in various areas of the brain. Opioids such as heroin are classified as depressants because they slow down neurotransmissions and brain activity. They slow down heart rate and lower blood pressure.