nervous system test

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nervous system test
2012-05-13 21:03:49

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  1. What parts of the body make up the CNS?
    Spinal cord and Brain
  2. What are the parts that make up PNS?
    • afferent nerves--sensory nerves
    • efferent nerves--motor nerves
  3. gray matter
    • non-myelineanted
    • muscle control and sensory relay

    spine and brain
  4. white matter
    • most nerves
    • myelineated
    • carry messages between nerves
  5. dendrites
    recieve messages
  6. axons
    carry away messages
  7. sensory neurons
    carry messages from sense organs to the CNS
  8. motor neurons
    carry messages from muscle to glands
  9. why are there gaps between nuerons?
    • synaptic gaps
    • nuerotransmitters relay info from the nerve to another cell
    • lock and key method
  10. what division of the peripheral nervous system control voluntary response?
    somatic divison: carries info to CNS to skeletal muscle
  11. what part of the peripheral nervous system control involuntary responses?
    • autonomic division regulates the the internal evironment
    • CNS-->smooth mucles and glands
  12. interneuron
    • carry messages from neuron to neuron
    • found only in the CNS
    • decision making nerves
  13. which division of the nervous system is most closely associated with the fight or flight response?
    sympathetic: increase vitals
  14. Schwann Cells
    • make up the myelin sheath to promote better signal transmission
    • insulator
  15. Why do people with MS have problems controllign their muscle contractions?
    • autoimmune disease
    • The scar tissue or plaques form when the protective and insulating myelin covering the nerves is destroyed, a process called demyelination. Without the myelin, electrical signals transmitted throughout the brain and spinal cord are disrupted or halted.
  16. What do drugs and alcohol interfere with when they "use"?
    • forebrain
    • prefrontal cortex, the lobes
  17. explain: parasympathic and sympathetic=homeostasis
    • sympathetic= increase of vital. speed up!
    • parasympathetic=slow down vitals

    both counteract each other to keep the body in check
  18. brocas area
    • found in the base of precentral gyrus involved with speech ability
    • when its damages people are mute
  19. speech area
    people have difficulty comprehending language when this part of the brain is damages
  20. meninges
    • 3 connective tissue membranes covering the CNS structures
    • double layered sac that anchors the Brain in place
    • holds the fluid inside
    • keeps the blood from contaminating the fluid inside
  21. 4 ways that the brain is protected:
    • meninges
    • CSF
    • blood brain barrier
    • skull
  22. structural classification
    central and peripheral nervous system
  23. functional classification
    concerned with PNS
  24. CNS function
    interpret incoming sensory information
  25. PNS function
    conveys messages to the CNS
  26. thalamus
    relay station for sensory information going to sensory cortex
  27. hypothalamus
    regulates body temp, water balance, metabolism
  28. cerebellum
    controls skeletal muscle activity, balance, and equilibrium
  29. parietal lobe
    • langauage comprehension
    • taste
    • visual
    • spacial
  30. frontal lobes
    • concentration
    • emotion
    • voluntary movement
    • decision making
  31. temporal lobe
    hearing, balance, emotions, motivations
  32. pons
    • controls wake-sleep cycle
    • memory
  33. cerebellum
    • 2 hemispheres
    • reflexes
    • balance
    • learning
    • memory
    • movement/ coordination
  34. contusion
    brain bruising
  35. cerebral edema
    • swelling of the brain
    • neurological detioration