A&P 1 exam 3 (part 6)

Card Set Information

A&P 1 exam 3 (part 6)
2014-11-09 15:44:25
anatomy physiology nervous system

Nervous System: Action Potential as a mechanism for conveying information Fall 2014
Show Answers:

  1. specialized to respond to specific changes in environment of the cell
    neural receptors
  2. organization of neural system is ___ of how it works
  3. 2 classifications of neural receptors?
    • type of stimulus
    • body location
  4. 4 types of stimulus?
    • mechanical
    • thermal
    • chemical
    • electromagnetic
  5. touch, stretch receptors
    mechanical stimulus
  6. responds to change in temperature
    thermal stimulus
  7. sensitive to change in chemical environment of cell
    chemical stimulus
  8. responds to changes in light, visual info
    electromagnetic stimulus
  9. body location of neural receptors
    • exteroreceptors
    • enteroreceptors
  10. located close to surface of body
  11. located deep within body, gathers info from things inside body
  12. ex of enteroreceptors
    liver temperature
  13. all receptors give same response of?
    membrane potential
  14. depolarization of the receptor membrane
    generator potential
  15. third type of membrane potential
    generator membrane potential
  16. localized and cannot be transmitted
    generator potential
  17. must be capable of evoking action potentials in a peripheral process of the sensory neuron
    generator potential
  18. generator potential response is graded according to
    stimulus strength
  19. NOt an all of nothing response
    generator potential
  20. the stronger the _____, the greater the ____
    • stimulus
    • generator potential
  21. maintained for as long as the stimulus is present
    generator potential
  22. the longer the stimulus is present, the ____ is maintained
    generator potential
  23. 3 diff potentials?
    • generator
    • action
    • resting membrane
  24. action potentials cannot
  25. 4 types of coding action potentials
    • stimulus quality
    • stimulus location
    • stimulus strength
    • duration of stimulus
  26. type of receptor
    coding for stimulus quality
  27. location of receptor
    coding fro stimulus location
  28. coding for stimulus strength?
    • frequency of action potential
    • number of receptors stimulated
  29. low GP=, high GP =
    • low frequency of AP
    • high frequency of AP
  30. strong stimulus =
    high GP, constant AP
  31. weak stimulus =
    weak GP, widely spaced AP
  32. slowest rate =
    1 AP/sec
  33. highest rate of frequency =
    150 AP/sec
  34. as a stimulus gets stronger and stronger, more receptors
  35. as long as stimulus is present, continue to get action potentials
    coding for duration of stimulus
  36. process of becoming less responsive to continued presence of stimulus
  37. adaptation can be
    slow, intermediate or fast
  38. rapidly adapting unit
    touch receptor
  39. ex of adaption
    barrel recpetors of blood pressure most not stop
  40. 2 actions of local anesthetics?
    • receptor vs nerve fiber
    • temporary vs reversible
  41. in order to have action potential must have
    cell membrane
  42. LEFT OFF AT SYNAPSE where recording begins