Answer:
Stimulants are a class of drugs that “stimulate” the body's central nervous system, which includes the brain and spinal cord. They increase the levels of catecholamines—a family of brain chemicals that includes dopamine. These chemicals are used in the brain processes to signal reward and motivation.
A type of drug that increases the levels of certain chemicals in the brain and increases alertness, attention, energy, and physical activity. Central nervous system stimulants also raise blood pressure and increase heart rate and breathing rate.
Answer:
A magnetic compass points to the earth's magnetic poles, which are not the same as earth's geographic poles. ... When it comes to magnets, opposites attract. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, which lies close to the geographic north pole
I think the answer is A. gives a person the opportunity to discover the exercises that work best for his or her needs.
A person who is trained to examine the eyes for vision problems and to prescribe corrective lenses.
