Question

How does alcohol acts on our brain????

Answer 1

Alcohol directly affects brain chemistry by altering levels of neurotransmitters — the chemical messengers that transmit the signals throughout the body that control thought processes, behavior and emotion.  Alcohol affects both “excitatory” neurotransmitters and “inhibitory” neurotransmitters.

An example of an excitatory neurotransmitter is  Glutamate , which would normally increase brain activity and energy levels. Alcohol suppresses the release of glutamate, resulting in a slowdown along your brain’s highways.

Answer 2

Nicotine is increased and the blood makes some of the internal vibrations in our body and as it's level is decreased in our body it tends to full fill its level.