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| What your body does in reaction to a stimulus |
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| Any change or signal in the environment that can make an organism react |
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| The message the neuron carries |
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| Carry impulses toward the neuron's cell body |
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| Carries impulses away from the cell body |
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| Picks up stimuli from the internal or external environment and converts each stimulus into a nerve impulse |
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| Is a neuron that carries nerve impulses from one neuron to another |
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| Sends impulse to a muscle or gland and the muscle or gland reacts in response |
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| The junction where one neuron can transfer an impulse to another structure |
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| What does the Central Nervouse System consist of |
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| What does the Peripheral Nervous System include |
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| Nerves located outside of the central nervous system |
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| Located in the skull, is the part of the central nervous system that controls most functions in the body |
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| The thick column of vervous tissue that links the brain to most of the nerves in the peripheral nervous system |
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| Interprets input from the senses, controls movement, and carries out complex mental processes |
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| Second largest part,coordinates the actions of your muscles and helps you keep your balance |
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| Controls body's involuntary action - Those that occur automatically |
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| Controls voluntary actions such as using a fork or tying your shoes |
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| Controls involuntary actions |
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| Is a response that happened automatically |
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| Bruise like injury to the brain |
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| The clear tissue that covers the front of the eye |
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| Opening through which light enters the eye |
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| Circular structure that surrounds the pupil and regulates the amount of light entering the eye |
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| Is a flexible structure that focuses light |
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| The layer of receptor cells that lines the back of the eye |
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| Can see nearby objects clearly, but trouble seeing objects far away |
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| Can see distant objects clearly but nearby objects look blurry |
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| Separates the outer ear from the middle ear, is a membrane that vibrates when sound strikes it |
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| Snail-shaped tube that is lined with receptor cells that respond to sound |
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| Structures in the ear that are responsible for your sense of balance |
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| Any chemical taken into the body that causes changes in a person's body or behavior |
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| The deliberate misuse of drugs for purposes other than medical ones |
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| State in which a drug user needs larger and larger amounts of the drug to produce the same effect on the body |
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| Body becomes physically dependent on the drug |
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| A period of adjustment that occurs when a person stops taking a drug on which the body is dependent |
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| Drugs that slow down the activity of the Central Nervous System |
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| Synthetic chemicals that are similar to hormones produced in the body |
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| A drug found in many beverages, powerful depressant, illegal under the age of 21, most abused legal drug in people aged 12 to 17 |
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