Nicotine acts in the brain by: Multiple Choice increasing serotonin reuptake. enhancing GABA's inhibitory effects. reducing blood flow to the cerebral cortex. first stimulating and then blocking cholinergic receptors.

Explanation:

Nicotine is a type of stimulant that is chemically alkaloid. It works as the receptor agonist at the nicotinic acetylcholine receptor. It is a type of addictive chemical that increases the blood flow, heart rate and some biochemical reactions of the body. In the brain, it has stimulation as well as blocking effect. Medically, it is used for various purposes such as quitting smoking and some other.

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

i think the answer is g1

hope i

-lavira: )