Ch 12

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Ch 12
2009-11-29 20:24:58
Sensory Mechanisms

Sensory Mechanisms
Show Answers:

  1. What are the types of receptors?
    Mechanoreceptors, thermoreceptors, pain receptors, chemoreceptors, and photoreceptors.
  2. What do mechanoreceptors do?
    Respond to mechanical energy.
  3. What do thermoreceptors do?
    Respond to temperature, hot or cold.
  4. What do pain receptors do?
    Respond to tissue injury, excessive pressure.
  5. What do Chemoreceptors do?
    Respond to the presence of chemicals in the nearby area. (Taste and smell)
  6. What do photoreceptors do?
    Respond to light.
  7. What is an example of referred pain?
    Chest pain, tend to feel pain in the left arm.
  8. What are olfactory receptor cells?
    Chemoreceptors that bind with odorants.
  9. What is the correlation between taste and smell?
    Chewed food releases chemicals that come in contact with olfactory receptors.
  10. What are the smalles bones in the body?
    Malleus, incus, stapes (bones of the ear).
  11. What is the function of the outer ear?
    Channels sound waves, inner border is eardrum (tympanic membrane).
  12. What is the function of the middle ear?
    Amplifies sound.
  13. What is the function of the inner ear?
    Sorts and converts sound vibration to nerve impulses.
  14. Where is our best vision found?
  15. What is our blindspot?
    Optic disc
  16. What helps support the eyeball?
    Vitreous humor
  17. What is the function of vision?
    Detecting and interpreting visual stimuli by converting light energy to nerve impulses and transmitting them to the brain.
  18. How is light regulated?
    Iris opens or closes to control light to retina.
  19. What is myopia?
    Eye slightly longer, nearsighted.
  20. What is hypeopia?
    Eye is shorter, farsighted.
  21. What is astigmatism?
    Irregularities in cornea or lens.
  22. What does the retina allow us to see?
    In color, adapt to varying light intensities and perceive images.