The retina is made up of cells called rods and cones. The outer ear collects the sound waves and carries them to the ear drum causing it to vibrate. The stirrup vibrates against the cochlea found in the the inner ear. The vibrations pass through a fluid and move tiny hairs connected to neurons. When this mixture reaches the neurons at the bottom of each taste bud an impulse is sent to the brain.
Prescription drugs are drugs that can only be obtained with written premission from a doctor.
A drug that slows or blocks impulses at the synapse is a depressant. Alcohol is found in beer, wine, distilled beverages, and in some foods and medicines. It enters the blood stream through the stomach and small intestine. It is then quickly carried to the brain and other body organs. It speeds up the activity of the central nervous system.