Phy 200 Ch. 2

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snprrc102
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260077
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Phy 200 Ch. 2
Updated:
2014-02-03 21:47:04
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VWCC Phy 200
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Phy 200 ch 2
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VWCC Phy 200 ch 2 key words
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  1. Nervous System
    The body's electrochemical communication circuitry.
  2. Plasticity
    The brain's special capacity for change.
  3. Afferent nerves
    Also called sensory nerves; nerves that carry information about the external environment to the brain and spinal cord via sensory receptors.
  4. Efferent nerves
    Also called motor nerves; nerves that carry information out of the brain and spinal cord to other areas of the body
  5. Neural Networks
    Networks of nerve cells that integrate sensory input and motor output.
  6. Central nervous system
    The brain and spinal cord
  7. Peripheral nervous system
    The network of nerves that connects the brain and spinal cord to other parts of the body.
  8. Somatic system
    The body system consisting of sensory nerves, whose function is to convey information from the skin and muscles to the CNS about conditions such as pain and temp, and the motor nerves, whose function is to tell muscles what to do.
  9. Autononmic Nervous system
    The body system that takes messages to and from the body's internal organs, monitoring such processes as breathing, heart rate, and digestion.
  10. Sympathetic nervous system
    The part of the autonomic nervous system that arouses the body to mobilize it for action and thus is involved in the experience of stress
  11. Parasympathetic nervous system
    The part of the autonomic nervous system that calms the body.
  12. Stress
    The response of individuals to environmental stressors.
  13. Stressors
    Circumstances and events that threaten individuals and tax their coping abilities and that cause physiological changes to ready the body to handle the assault of stress.
  14. Neurons
    One of two types of cells in the nervous system; neurons are the nerve  cells that handle the information processing function
  15. Glial Cells
    The second of two types of cells in the nervous system; glial cells (also called glia) provide support, nutritional benefits, and other functions and keep neurons running smoothly.
  16. Cell Body
    The part of the neuron that contains the nucleus, which directs the manufacture of substances that the neuron needs for growth and maintenance.
  17. myelin sheath
    A layer of fat cells that encases and insulates most axons.
  18. Dendrites
    Treelike fibers projecting from a neuron, which receive information and orient it toward the neuron's cell body.
  19. axon
    The part of the neuron that carries information away from the cell body toward other cells.
  20. Resting potential
    The stable, negative charge of an inactive neuron.
  21. Action potential
    The brief wave of positive electrical charge that sweeps down the axon.
  22. All-or-nothing principle
    The principle that once the electrical impulse reaches a certain level of intensity(its threshold), it fires and moves all the way down the axon without losing any intensity.
  23. Synapses
    Tiny spaces between neurons; the gap between neurons is referred to as synaptic gap.

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