What is the effect of stimulants on the body?

Stimulants are substances that increase the activity of the central nervous system, leading to heightened alertness, increased energy, and an accelerated heart rate. When consumed, these substances affect neurotransmitters in the brain, which can lead to feelings of euphoria or increased focus. This stimulation can result in faster reaction times and a sense of increased mental clarity, making the individual feel more awake and capable of performing tasks.

This effect on the central nervous system is why stimulants are sometimes misused, as they can temporarily enhance performance or mood. However, it's important to note that while stimulants may seem helpful in the short term, they can lead to negative consequences, including addiction and other health issues.

The other answer choices do not accurately reflect the known effects of stimulants. Relaxation would typically be associated with depressants rather than stimulants. Heightened impairment refers more to substances that diminish cognitive and motor functions, not enhance them. Stating that stimulants have no effect contradicts the well-documented physiological changes that they cause in the body.