19 terms

Nervous System

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Central Nervous System (CNS)
Brain & Spinal Cord
Peripheral Nervous System (PNS)
Sensory Neurons, Motor Neurons, Sense Organs, receptors
Sensory Neuron
Receives info from environment, sends impulses to brain/ spinal cord
Motor Neuron
Carries impulses in brain/ spinal cord to muscles or glands
Nerve Impulse
Electrical message within a neuron, chemical message between neurons
Receptor
Structures in skin and sense organs, senses a change in the environment then sends impulses to sensory neurons
Neurotransmitters
Chemicals that carry a nerve impulse between neurons
Synapse
Space between 2 neurons
Cerebellum (location)
Behind and under cerebrum
Cerebellum (function)
Sends impulses to voluntary muscles, controls coordination, keeps balance and muscle tone
Brain Stem (location)
Extends below cerebrum
Brain Stem (function)
Connects brain and spinal cord, controls involuntary muscles
Cerebrum (location)
Largest part of brain, left/right hemispheres
Cerebrum (function)
Interprets impulses from senses, memory stored, voluntary muscles controlled, thinking
Medulla (location)
small oblong node on the brainstem
Medulla (function)
Controlls basic involuntary functions such as heart rate, breathing, etc.
Stimulant
Class of drugs that increases heart rate, increases nervous system activity
Depressant
Class of drugs that decreases heart rate, decreases nervous system activity
Hallucinogen
Class of drugs that disrupts nervous system activity, mimics schizophrenia and other severe mental illnesses