types and functions of neurotransmitter.

neurotransmitter nervous system brain nerve cell synapse hippocampus histamine human body draw anatomy antihistamine antihistamines essential allergic allergies basophils cerebellum cerebral cortex decreased conscious dopamine healthcare immune responses inflammatory response amygdala medical medulla nucleus accumbent pathogens physiological posterior pituitary laziness receiving receptor rhinitis spinal cord substantial nitrogenous treatment types functions chemical messengers working transmit signals cells target work neurotransmitter