Award Best Answer. Once your question has been posted for at least 1 hour and has at least one answer, click on 'Award Best Answer' button next to your chosen answer. 1  Upload failed. 2  Please upload a file larger than 100x100 pixels. 3  We are experiencing some problems, please try again.
Alcohol dilates peripheral blood vessels, but has been known to actually. constrict some blood vessels in the brain, lowering the oxygen content. Alcohol dilates peripheral blood vessels, but has been known to actually  constrict some blood vessels in the brain, lowering the oxygen content.
Alcohol is a central nervous depressant. In short, alcohol depresses, or slows down the bodyâs central nervous system (CNS). As oneâs blood alcohol level goes up, the effects of the depressant become more pronounced. As intoxication increases, cognitive processing slows and motor coordination decreases. This is because the brain is part of the CNS, and is affected by alcohol.