A. barbiturates - suppresses brain activity by blocking the ability of nerves in the brain from sending or receiving signals
B. depressants - reduces the activity of the central nervous system
C. caffeine - found in coffee beans, tea leaves, and cocoa beans
D. tranquilizers - reduces the physical and psychological symptoms of anxiety by reducing brain activity
E. narcotics - pain-killing drugs that are derived from opium
F. stimulants - increases the activity of the central nervous system
G. amphetamines - increases the heart rate and suppresses the appetite
H. cocaine - first used by Europeans as a local anesthetic; now abused for its euphoric effects
Explanation:
Barbiturates are hypnotics and sedatives drugs. Are general depressants of all excitable cells, the CNS (central nervous system) being the most sensitive to their action. They act on GABA receptor enhancing GABAergic action, increasing GABA, inducing chloride channel opening time, exerting allosteric action. Thus, they inhibit the release of calcium-dependent neurotransmitters; depress glutamate-induced neuronal depolarization through AMPA receptors. At high concentrations, they are able to depress sodium and potassium channels.
Depressive drugs, or simply depressants, are drugs that decrease the level of activity in the brain, slowing down the body. They are widely used in hospitals with controlled doses.
Caffeine acts as a stimulant on metabolism and heart by increasing cardiac working capacity, producing peripheral vessel dilation and promoting gastric secretion production. It can be found in coffee beans, tea leaves, and cocoa beans.
Tranquilizers or anxiolytics are medicines used to decrease anxiety and tension. They act on the neurotransmitters of the central nervous system, bringing about the balance of feelings of anxiety and stress. This is because these substances can inhibit the brain areas that have an overworking.
Narcotic refers to a variety of substances that make you fall asleep and reduce or eliminate sensitivity. In medicine, the term refers only to opium, opium derivatives and their synthetic or semi-synthetic substitutes used as anesthetics or pain killers.
Stimulants are substances that have a direct effect on the central nervous system because they increase the stimulation of the cardiac and metabolic system.
Amphetamines are stimulants of the central nervous system. The effects consist of increased energy and euphoria, extreme alertness, hostility, impaired judgment, elevated blood pressure, tachycardia, mydriasis, nausea, vomiting and also supress the appetite.
Cocaine, also known as coca, is a stimulating alkaloid with anesthetic effects used primarily as a recreational drug.
