Chapter2Overview - Myers PSYCHOLOGY Chapter2 Neuroscience...

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Myers’ PSYCHOLOGY Chapter 2    Neuroscience and Behavior
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Neural Communication Biological Psychology branch of psychology concerned with the links  between biology and behavior some biological psychologists call themselves  behavioral neuroscientists,  neuropsychologists, behavior geneticists,  physiological psychologists,  or   biopsychologists Neuron a nerve cell the basic building block of the nervous system
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Neural Communication Dendrite the bushy, branching extensions of a neuron that  receive messages and conduct impulses toward the  cell body Axon the extension of a neuron, ending in branching  terminal fibers, through which messages are sent to  other neurons or to muscles or glands Myelin [MY-uh-lin] Sheath   a layer of fatty cells segmentally encasing the fibers of  many neurons enables vastly greater transmission speed of neutral  impulses
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Neural Communication
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Neural Communication Action Potential   a neural impulse;  a brief electrical charge that  travels down an axon generated by the movement of positively  charged atoms in and out of channels in the  axon’s membrane Threshold   the level of stimulation required to trigger a  neural impulse
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Neural Communication Cell body end of axon Direction of neural impulse: toward axon terminals
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Neural Communication Synapse [SIN-aps] junction between the axon tip of the sending neuron  and the dendrite or cell body of the receiving neuron tiny gap at this junction is called the  synaptic gap  or  cleft Neurotransmitters chemical messengers that traverse the synaptic gaps  between neurons when released by the sending neuron, neuro- transmitters travel across the synapse and bind to  receptor sites on the receiving neuron, thereby  influencing whether it will generate a neural impulse
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Neural Communication
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Neural Communication Serotonin Pathways Dopamine Pathways
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Neural Communication
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Neural Communication Acetylcholine [ah-seat-el-KO-leen]   a neurotransmitter that, among its  functions, triggers muscle contraction Endorphins [en-DOR-fins]   “morphine within”  natural, opiatelike neurotransmitters  linked to pain control and to pleasure
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Neural Communication Neurotransmitter molecule Receiving cell membrane Receptor site on receiving neuron Agonist mimics neurotransmitter Antagonist blocks neurotransmitter
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The Nervous System Nervous System   the body’s speedy, electrochemical  communication system  consists of all the nerve cells of the peripheral  and central nervous systems Central Nervous System (CNS)   the brain and spinal cord Peripheral Nervous System (PNS)
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This note was uploaded on 02/14/2010 for the course PSY 101 taught by Professor Jackson during the Spring '08 term at Michigan State University.

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Chapter2Overview - Myers PSYCHOLOGY Chapter2 Neuroscience...

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