Drinking alcohol would impair your judgement and your motor skills. This means that when diving into water, people who drinks alcohol are much more likely to be involved in a fatal accidents compared to sober driver. It is advised that you maintain your BAC lower than 0.02 before diving.
At a more integrative level, the primary function of the nervous system is to control and communicate information throughout the body. It does this by extracting information from the environment using sensory receptors. This sensory input is sent to the central nervous system, which determines an appropriate response.
Explanation: The nervous system is involved in receiving information about the environment around us (sensory functions, sensation) and generating responses to that information (motor functions, responses) and coordinating the two (integration).