Nervous System

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Nervous System
2011-07-13 20:44:45
Intro AP

miniquiz 4
Show Answers:

  1. The spinal cord and brain is part of the
    central nervous system
  2. impulses cross a synase with the help of
    chemicals, like actylcholine
  3. the parasympathatic division controls
    most normal day involuntary activities of our body
  4. the iris of our eyes contain
    smooth involuntary muscle
  5. The inner area of the ear includes the
    cochlea, vestibule, semicircular canals
  6. the specialized endings (beginnings) of sensory neurons are called
    cutaneous receptors, hearing receptors, and visual receptors
  7. the level of stimulation that must be reached before a neuron will "fire up" is called the
  8. the ortion of the neuron carrying impulses towards the neuron cell body is the
  9. the point where the axon fibers of one neuron come close to the dendrite fibers of the next neuron is called the
  10. an important function of the spinal cord is to serve as
    the reflex center
  11. motor neurons have their cell bodies located in the
    spinal cord
  12. some important plexes are found in the
    cervical and lumbar regions
  13. the cerebellum
    • concerned with balance and equilibrium
    • somatic
  14. the hypothalamus
    • is an important autonomic center
    • control of heart, bloodpressure, and tempurature
  15. the vagus nerve is the
    tenth cranial nerve
  16. the muscles that move the eyeball around are called the
    extrinsic eye muscle
  17. intrinsic eye muscles
    are attached to the lens of the eyes
  18. functions of the nervous system
    • stimulus-response system
    • what our body does when a stimulus is picked up
  19. neuroglia cell
    • found in the brain and spinal cord.
    • function: to fill spaces for structural support
  20. neurons
    • true conducting cells
    • cannot divide
  21. voluntary nervous systm
    can fire at wil
  22. involuntary nervous system
    • sympathetic: speeds up
    • parasympathetic: slows down
  23. nerves are
    bundles of neurons
  24. basic structure of a neuron
    • dendrite recieve stimulus
    • cell body
    • axon carry the stimulus aways
  25. sensory (afferent)
    message TOWARDS the brain
  26. motor (efferent)
    message AWAY from the brain
  27. impulse
    message traveling along the nerve and motor neurons together for reflex purposes
  28. threshold
    certain point in order to reach firing level
  29. all or nothing law
    message will keep moving if threshold is met. if not, nothing will send at all.
  30. synapse
    the breakdown between 2 neurons
  31. function of the spinal cord
    neural pathway for impulses going to thebrain. reflex center
  32. structure of spinal cord
    • pia matter, arachnoid, durra matter
    • PAD
  33. function of the brain
    • interprets incoming sensory info
    • initiates MOTOR response
  34. how many pairs of spinal cords?
    31 pairs!
  35. special senses
    • 1. eyes
    • 2. ears (hearing and equilibrium)
    • 3.olfaction (sense of smell)
    • 4. taste
    • 5.cutaneous (skin)
    • 6. proprioception: awarness of muscles