Ch. 17

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TheseFights
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228114
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Ch. 17
Updated:
2013-07-25 01:46:36
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special senses
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ch. 17
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  1. Olfactory information is first received by which part of the brain?
    cerebrum
  2. A normal, relaxed inhalation carries about ________ of the inhaled air to the olfactory organs.
    2 percent
  3. Olfactory receptors send axons through the cribriform plate. They synapse on neurons in the
    olfactory bulb
  4. Gustatory receptors are located
    on the surface of the tongue
  5. What lingual papillae has the largest number of taste buds?
    circumvallate papillae
  6. Stimulation of nociceptive receptors within the trigeminal nerve might produce a perception of
    peppery hot
  7. What structure changes the shape of the lens for far and near vision?
    ciliary body
  8. The palpebrae are connected at the
    lateral and medial canthus
  9. A structure that is located at the medial canthus and contains glands that contribute to a gritty deposit is the
    lacrimal caruncle
  10. The ________ covers most of the exposed surface of the eye.
    conjunctiva
  11. The opening in the iris through which light passes is the
    pupil
  12. A ray of light entering the eye will encounter these structures in which order?
    conjunctiva → cornea → aqueous humor → lens → vitreous body → retina → choroid
  13. Pupillary muscle groups are controlled by the ANS. Parasympathetic activation causes pupillary ________, and sympathetic activation causes ________.
    constriction; dilation
  14. Why must accommodation occur to view objects closer than 20 feet from the eye?
    The light rays are divergent instead of parallel and require more refraction
  15. The optic disc is a blind spot because
    there are no photoreceptors in that area
  16. An elongate outer segment containing membranous discs and a narrow connecting stalk that attaches the outer segment to the inner segment describes
    a photoreceptor
  17. The first step in the process of photoreception is
    absorption of a photon by a visual pigment
  18. Where are the visual pigments located in the rods and cones?
    inside membrane discs stacked in the outer segment
  19. Which of these anatomical sequences is correct?
    tympanum - malleus - incus - stapes - oval window - round window
  20. The ________ ear collects sounds waves and transmits them to the ________ ear, which contains auditory ossicles
    outer; middle
  21. The frequency of a perceived sound depends on
    which part of the cochlear duct is stimulated
  22. An infection that damages the vestibular nerve could result in a loss of
    equilibrium
  23. The structure attached to the oval window that transmits vibrations from the tympanic membrane to the inner ear is the
    stapes
  24. The superficial hard part of the inner ear is called the ________ and contains ________ .
    bony labyrinth; perilymph
  25. The sensory receptors of the semicircular canals are located in the
    ampullae
  26. The structure that supports the organ of Corti is the
    basilar membrane
  27. The vibrations received by the tympanic membrane are transferred to the oval window by the
    auditory ossicles
  28. What are stapes?
    seals the oval window

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