nervous system

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tinnaa012
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133836
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nervous system
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2012-02-16 18:44:39
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  1. 3 main functions of nervous system
    • -sensory input
    • -integration
    • -motor input
  2. 2 main parts of a neuron and what they contain;
    • -cell body (nucleus, nissl substance, neurofibrils)
    • -processes (axons and dendrites)
  3. what do myelin sheaths do to help the fibers on a neuron
    help nerver fibers transmit messages, insulation, and protection
  4. what do the left and right hemisphere control
    • left; controls math, analytical and language
    • right; creativity, artisitic ability, and spontaneous thoughts
  5. what is the spinal cord responsible for
    involuntary actions such as reflexes, heart rate, breathing, sleeping, and blood pressure
  6. how is a stroke caused?
    by a clot in blood vessel to brain
  7. brain tumors are caused by
    brain cells that go through mitosis uncontrollably
  8. the thalamus is
    relay station for sensory impulses
  9. hypothalamus deals with
    regulating the body temperautre, water balance, and metabolism
  10. the epithalamus..
    forms cerebrospinal fluid
  11. astrocytes;
    star shaped cells, control chemical environment of brain
  12. microglia;
    spider like phagocytes, dispuse of debris
  13. ependymal cells;
    circulate cerebrospinal fluid and line caviites of brain n spinal
  14. sateliitle cells;
    protect neuron cell bodies
  15. diencephalon made of 3 parts:
    • -thalamus
    • -hypothalamus
    • -epithalamus
  16. sits on top of brain stem
    diencephalon
  17. parts of brain stem;
    • -midbrain
    • -pons
    • -medulla
  18. lowest part of brain stem
    medulla
  19. 5 means of protection in NS
    • -scalp
    • -cerebralspinal fluid
    • -meninges
    • -blood brain barrier
    • -skull
  20. sympathetic NS
    organ responses in fight or flight division; spinal cord controls in this
  21. parasympathetic NS
    rest and digest division cranial nerves
  22. nerve impusles away from cell body
    axons
  23. nerve impulses toward cell body
    dendrites
  24. space btw axon ending of 1 neuron n dendrite of another
    synaptic cleft
  25. acetylcholine stimulates
    muscles
  26. part of brain responsible for body movements
    cerebellum
  27. brain n spinal cord are covered by protective layers
    meninges
  28. white matter is composed of
    extensions
  29. gray matter is composed of
    neuron cell bodies
  30. what lobe initiates motor input?
    frontal
  31. area thats associated w/ speech
    broca's
  32. this helps control functioning of most interal organs n control secretres of pit. gland
    hypothalamus
  33. little brain
    cerebellum
  34. nerve impulses to and from brain
    cranial
  35. nerves that take impusles to and from spianl cord
    spinal
  36. frontal lobe
    speech, thought, emotion, movement learning
  37. pareital lobe;
    body sensations

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