Quiz 2
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| Statistical Significance | A statistical statement of how likely it is that an obtained result occurred by chance.
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| Hindsight Bias | The tendency to believe, after learning an outcome, that one would have foreseen it. (aka i knew it all along phenomenon)
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| Population | All the cause in the group, from which sample may be drawn for study.
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| Normal Curve | The symmetrical bell shaped curve that described the distribution of many physical and psychological attributes. Most scores fall near the average, and fewer and fewer scores lie near the extremes.
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| Neuron | a nerve cell; the basic building block of the nervous system.
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| Sensory Neurons | neurons that carrying incoming information from the sense reception to the central nervous system.
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| Interneurons | central nervous system neurons that internally communicate and intervene between the sensory inputs and motor outputs.
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| Dendrite | the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body.
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| Axon | the extension of a neuron, ending in branching terminal fibers, through which messages pass to other neurons or to muscle or glands.
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| Myelin Sheath | a layer if fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmission speed of neural impulses as the impulse hops from one node to the next.
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| Action Potential | a neural impulse; a brief electrical charge that travels down an axon. The action potential generated by the movement of positively charge atoms in and out of channels in the axon's membrane.
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| Threshold | the level of stimulation required to trigger a neural impulse
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| Synapse | the junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron.
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| Neurotransmitter | A chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure
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| Reuptake | the reabsorption by a neuron of a neurotransmitter following the transmission of a nerve impulse across a synapse
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| Endorphins | "morphine within" natural, opiate like neurotransmitter linked to pain control and to pleasure.
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| Nervous System | the body's speedy , electrochemical communication networks, consisting of all the nerve cells of the peripheral and central nervous system.
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| Central Nervous System | the brain and spinal cord.
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| Peripheral Nervous System | the sensory and motor neurons that connect the central nervous system to the rest of the body.
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| Parasympathetic Nervous System | the division of the autonomic nervous system that calms the body, conserving its energy.
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