Most effects of amphetamines are produced by mimicking acetylcholine.

How has the rate of prescriptions for stimulants to treat ADHD changed since 1990?

At which of the following will the days (amount of daylight vs. darkness) be even?

Cocaine enhances athletic performance involving strength or endurance.

Waves with a high frequency will have a longer wavelength.

Physical dependence on caffeine has not been demonstrated.

The figures displayed on the figure above will vary based upon local or regional conditions.  For example, in some locations more insolation may be scattered or absorbed due to heavy cloud coverage.

If you are located at 35 north latitude, you will experience a situation where the sun is directly overhead (at 90 degrees) twice a year.

A hot object such as the sun releases a greater amount of energy that is concentrated along the short end of the electromagnetic spectrum.

Alpha motor neurons form connections with muscle fibers at the _____.