Question: Which statement best depicts the impact of alcohol on sleep cycles? Multiple choice question. Alcohol is a depressant, meaning it inhibits sleep. It may also increase light sleep and decrease deep sleep. Alcohol is a stimulant, meaning it inhibits sleep. However, it also decreases the total number of sleep cycles. Alcohol is a stimulant, meaning it induces sleep. Additionally, it reduces deep sleep and REM sleep. Alcohol is a depressant, meaning it induces sleep. However, it inhibits deep sleep and REM sleep.