(a) What effect does alcohol have on reaction time?

(b) What other short-term effects does alcohol have?

 (c) What long-term effects can result from an excessive alcohol intake?

(a) Alcohol increases a person's reaction time (responses are slower).

 (b) Alcohol causes vaso-dilation, enhance in self-confidence, reduction of accuracy and, in some people, irresponsible behaviour.

 (c) Excessive intake of alcohol over a long period can injure the stomach, liver (cirrhosis of the liver), nervous system and brain. It might also be induce dependence (alcoholism).