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| study links b/w biological activity and psychological events; gain understanding of sleep & dreams, depression & schizophrenia, hunger & sex, stress & disease |
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| receives information and conduct it toward cell body (listens) |
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| from cell body, passes the message along to other neurons, muscles, or glands (speaks) |
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| layer of fatty tissue that insulates axons and helps speed impulses |
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| impulse; brief electrical charge that travels down the axon |
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| the junction that separates one neuron's axon terminal and the receiving neuron |
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| plays a role in learning and memory, messenger b/w every motor neuron & skeletal muscle; when released, muscle contracts |
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| natural opiates released in response to pain and vigorous exercise; trigger "runner's high" |
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| body's speedy electrochemical information network |
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| central nervous system (CNS) |
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| peripheral nervous system (PNS) |
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| links CNS with body's sense receptors |
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| electrical cables in which axons carrying PSN info are bundled into |
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| send info from body's tissue and sensory organs inward to CNS |
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| CNS sends instructions out into body's tissues via these |
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| where information is processed by CNS's internal communication (between sensory input and motor output) |
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| enables voluntary control of our skeletal muscles |
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| controls glands and muscles of our internal organs |
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| sympathetic nervous system |
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| arouses; accelerates heartbeat, raises blood pressure, slows digestion, raises blood sugar, cools with perspiration (when something alarms, enrages, or challenges you) |
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| parasympathetic nervous system |
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| decreases heartbeat, lowers blood sugar (calms) |
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| automatic responses to stimuli, before brain receives and responds to information that causes pain |
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| its glands secret another form of chemical messengers (hormones) |
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| release epinephrine and norepinephrine (adrenaline and noradrenaline) in a moment of danger |
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| epinephrine and norapinephrine |
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| increase heart rate, blood pressure, and blood sugar; provides surge of energy |
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| releases hormones that influence growth; "master gland" |
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