Vocabularies!!
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| are specialized cells that help you gather information about your environment, interpret the information, and react to it. | neurons
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| receive signals called impulses from other neurons and conduct the impulses to the cell body. | dendrites
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| is the nucleus of the neuron and many of the cell organelles are found. | cell body
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| carries the nerve impulse from the cell body to other neurons and muscles. | axon
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| is a nerve pathway that consists of a sensory neuron, inter neuron, and motor neuron. | reflex arc
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| is another name for a nerve impulse. | action potential
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| is the minimum stimulus to cause an action potential to be produced. | threshold
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| is the myelin sheath has many gaps. | nodes
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| is a small gap exists between the axon of one neuron and the dendrite of another neuron. | synapse
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| is a chemical that diffuses across a synapse and binds to receptors on the dendrite of a neighboring neuron. | neurotransmitter
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| is the brain and the spinal cord make up the... | central nervous system
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| consists of the sensory neurons and motor neurons that carry information to and from the CNS. | peripheral nervous system
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| is the largest part of the brain and is divided into two halves called the hemisphere. | cerebrum
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| relays signals between the brain and the spinal cord. | medulla oblongata
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| relays signals between the cerebrum and the cerebellum. | pons
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| regulates body temperature, thirst, appetite, and water balance. | hypothalamus
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| relay information from external sensory receptors to the central nervous system, and motor nerves relay information from the central nervous system and skeletal muscles. | somatic nervous system
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| carries impulses from the central nervous system tot eh heart and other internal organs. | autonomic nervous system
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| is most active times of emergency or stress when the heart rate and breathing rate increase. | sympathetic nervous system
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| is most active when body is relaxed. | parasympathetic nervous system
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| are areas of specialized chemical receptors on the tongue that detect the taste of sweet, sour, bitter, and salty. | taste buds
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| which inverts the image and projects it into the retina. | lens
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| contains numerous receptor cells called the rods and cones. | retina
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| are light-sensitive cells that are excited by low-levels of light. | rods
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| function in bright light and provide information about color to the brain. | cones
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| is filled with fluid and lined with tiny hair cells. | cochlea
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| transmit information about body position and balance to the brain. | semicircular canals
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| is a substance, natural or artificial, that alters the function of the body. | drug
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| is a neurotransmitter found in the brain that is involved with the control of body movements and other functions. | dopamine
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| are drugs that increase alertness and physical activity. | stimulants
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| are drugs that tend to slow down the central nervous system. | depressants
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| occurs when a person needs more and more of the same drug to get the same effect. | tolerance
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| is the psychological and/or physiological dependence on a drug. | addiction
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