Depressant

Action Potential Addiction Autonomic Nervous System Axon Brain Brain Stem Cell Body Central Nervous System Cerebellum Cerebral Cortex Cerebrum Cochlea Cone Cells Dendrite Drug Drug Tolerance Hypothalamus Medulla Oblongata Nervous System Neuron Neurotransmitter Parasympathetic Nervous System Peripheral Nervous System Reflex Reflex Arc Resting Potential Retina Semicircular Canal Somatic Nervous System Stimulant Sympathetic Nervous System Synapse Taste Bud Threshold