A&P

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Author:
nikkibeck
ID:
107240
Filename:
A&P
Updated:
2011-10-08 05:34:18
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Sensation
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Sensation
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  1. Define sensation?
    awareness of the environment
  2. Define adaptation?
    receptors respond less to prolonged stimulation
  3. Define pain?
    unpleasant sensation d/t real or potential damage
  4. Define proprioception?
    subconscious awareness of body position
  5. Define olfacation?
    smell, mediated by chemoreceptor
  6. Define gustation?
    • taste, mediated by chemoreceptor
    • adaptation: yes
  7. Define audition?
    • outer ear- pinna > external auditory, canal= funnels sound
    • middle ear- tympanic membrane > ossicles= amplifies sound
    • inner ear-
    • A. cochlea= hearing (mechanoceptor)
    • B. vestibule and semicircular canals= equilibrium (proprioceptors)
  8. Which senses are not subject to adaptation?
    • a. proprioception (unconscious awareness of body position)
    • b. vision
    • c. pain
  9. What are the general senses, and what receptor types do they serve?
    • a. touch- thermoceptor
    • b. pain- nociceptor
    • c. proprioception- proprioceptor
  10. What are the special senses? Whisch receptor type serves each one?
    • a. olfacation- chemoreceptor
    • b. gustation- chemoreceptor
    • c. vision
  11. What is the purpose of pain?
    protection
  12. What is the location and function of the cornea?
    anterior transparent....refracts light
  13. What is the location and function of the aqueous humor?
    anterior cavity....nourishes cornea and lens
  14. What is the location and function of the iris?
    anterior lens....regulates light passage thru pupil
  15. What is the location and function of the lens?
    posterior to iris and pupil....refracts (bends) light to focus image on retina
  16. What is the location and function of the vitreous humor?
    posterior activity....maintains eye shape
  17. What is the location and function of the choroid?
    between sclera and retina....vessels nourish retina
  18. What is the location and function of the retina?
    inner posterior....image formation
  19. Define accomodation and what is its purpose?
    bulging of lens....to focus near objects
  20. Define photopigment?
    molecule that absorbs light, changes structure, and produces a potential
  21. What 2 structures contain photopigments?
    rods and cones
  22. What is the function of the rod photoreceptor neuron?
    dark vision and shape detection
  23. What is the function of the cone photoreceptor neuron?
    light vision, sharpeness, and color
  24. What are the 3 major divisions of the ear?
    • outer ear
    • middle ear
    • inner ear
  25. What is the structure of the outer ear
    pinna > external auditory canal
  26. What is the structure of the middle ear?
    tympanic membrane > ossicles
  27. what is the structure of the inner ear?
    cochlea, and semicircular canals
  28. What is the function of the tympanic membrane and ossicles?
    amplifies sound
  29. What sense is mediated by the cochlea?
    mechanoreceptor
  30. What sense is mediated by the vestibule and the semicircular canal?
    proprioceptor

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