What is one of the effects of stimulants on the body?

Stimulants are substances that lead to increased physiological and psychological activity. One of the primary effects of stimulants on the body is the enhancement of alertness and energy levels. This occurs because stimulants work by increasing levels of neurotransmitters like dopamine and norepinephrine in the brain, which are associated with heightened arousal and focus.

This effect can result in improved cognitive function, heightened awareness, and often a sense of increased energy, making this answer accurate. In contrast, options such as decreased heart rate, improved sleep quality, and lowered blood pressure are typically not associated with stimulant use, as these substances generally have the opposite effects—such as increasing heart rate and potentially disrupting sleep.