What is an effect of alcohol entering the bloodstream?

When alcohol enters the bloodstream, it has a variety of physiological effects on the body, particularly on the central nervous system and the adrenal glands. The correct choice reflects that alcohol can stimulate the adrenal glands, which are responsible for producing hormones such as adrenaline. This stimulation can lead to increased heart rate, elevated blood pressure, and heightened alertness initially, transforming the state of the individual.

In contrast, alcohol does not decrease heart rate; instead, its initial effects can be stimulating followed by potential depressant effects as consumption continues. Alcohol's effects are not limited to causing dizziness but also include impairments in judgment, coordination, and balance, among other symptoms. Furthermore, it significantly impacts the brain, altering neurotransmitter function and affecting mood, behavior, and cognitive abilities. Thus, the direct stimulation of the adrenal glands is a critical avenue by which alcohol exerts some of its immediate physiological effects.