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Best Answer: Alcohol or ethanol affects the human nervous system by inhibiting signals between the brain, nerve endings and spinal cord. When people drink, their bloodstream absorbs the alcohol and nervous system functions slow down dramatically--this is the buzz or numbness people commonly feel after drinking.
Well your brain does every day, getting messages from your nerve cells to your body. It needs to send the correct messages throughout your body so it functions correctly. Alcohol acts on the nerve cells of the brain and disrupts the communication between nerves cells and other cells of the body. Alcohol does this by altering the actions of two major neurotransmitters in the brain. 1.