anatomy chapter 12 test

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phantomr254
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266629
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anatomy chapter 12 test
Updated:
2014-03-16 13:44:17
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anatomy
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science anatomy
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for a chapter 12 anatomy test
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  1. Nervous system composed of 2 parts
    • 1. Somatic (SNS)
    • 2. Autonomic (ANS)
  2. Afferent
    Part of the PNS that brings sensory information to the CNS from receptors
  3. Efferent
    Brings the CNS from the brain to the PNS
  4. Somatic Nervous system (SNS)
    nerves associated with voluntary control
  5. Autonomic nervous system (ANS)
    nerves involved in involuntary control
  6. 2 parts of ANS
    • 1. Sympathetic (increase action)
    • 2. Parasympathetic (decrease)
  7. Soma
    the cell body, contains the perikoryion, dendrites and the axon
  8. Neurotransmitters
    chemicals which stimulate a neural response
  9. Axoplasmic transport
    the movement of materials from the cell body to the synaptic knob
  10. Anterograde flow
    the flow of materials from the Soma to the periphery
  11. Retrograde flow
    the flow of material from the periphery to the Soma
  12. Neuron Classification
    • 1.Structural 
    • 2. functional
  13. Structural (neuron) 4 parts
    • 1. Anaxomic 
    • 2. Bipolar
    • 3. Unipolar
    • 4. Multipolar
  14. Somatic
    Monitor the outside world and our positions within it
  15. Visceral
    Monitor internal conditions
  16. 3 types of Receptors
    • 1. Exteroceptores
    • 2. Propiroceptors 
    • 3. Interoceptors
  17. 4 types of Neuroglial cells
    • 1) Ependymal
    • 2) Astrocytes
    • 3) Oligodedrocytes
    • 4) Microylia
  18. Astrocytes functions
    • 1. Help to form the blood brain barrier 
    • 2. From structural framework for neurons 
    • 3. Repair damaged neural tissue
    • 4. Help in some way to development
    • 5. Control interstitial environment
  19. Nods of Renvier
    Gaps in the Myelin sheath, allow for axons to branch out
  20. Resting potential
    • transmebrane potential for a resting cell 
    • mV -70
  21. Graded Potential
    a temporary localized change in the resting potential
  22. Action potential
    an electrical impulse produced by a large graded potential
  23. Active (gated) channels classes
    • 1. Chemical regulated 
    • 2. Voltage 
    • 3. Mechanically
  24. deporization
    Shift from resting potential towards 0 or above
  25. Hyperpolarzation
    loss of positive ions making the potential -80 mV or more
  26. Action potentials are dependent
    • 1) the membrane must be depolarized to the threshold 
    • 2) Voltage gates for Na channels open making the membrane more permeable
    • 3)The membrane has returned to normal permeability but the k ions briefly move out faster than normal causing a brief hyper polarization (-90)
  27. 3 groups of axons
    • 1. Type A- larger and fastest 300 mph
    • 2. Type B- smaller and much slower 40
    • 3. Type C fiber- smallest and very slow 2
  28. Chemical synapses order
    order
  29. Neurotransmitters
    • 1. Norepinephrine 
    • 2. Dopamine 
    • 3. Serotonin 
    • 4. Gammaminobutyrie acid
  30. Environmental factors that neural functions
    change in pH, ions, temperature
  31. Serial
    the relaying of info from one neuron to another
  32. Parallel
    When many neurons process the same information at one time
  33. Reverberation
    A positive feedback along a chain of neurons such that they remain active once stimulated

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