Biomed 100 Practice Quiz
Chapter 10, Spring 2007
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Multiple Choice - One Correct Choice Per Question
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  1. The receptors that detect pressure, stretch, movement, or vibrations are...
    1. photoreceptors
    2. chemoreceptors
    3. mechanoreceptors
      4.
    4. all of the above
    5. none of the above

  2. The primary function of the small bones of the middle ear is to...
    1. support and protect the middle ear cavity
    2. provide a framework for the hair cells
    3. provide a framework for the tympanic membrane
    4. conduct and intensify incoming vibrations
      5.

  3. Which ossicle(s) is/are in direct contact with the inner ear?
    1. incus (anvil)
    2. malleus (hammer)
    3. stapes (stirrup)
      4.
    4. both A. and B.
    5. both B. and C.

  4. Which one of the following is false?
    1. The receptors for hearing are located in the auditory tube.
      2.
    2. The receptors for hearing are called "hair cells."
    3. The receptors for hearing are connected to sensory neurons.
    4. The receptors for hearing are stimulated by vibrations in the ear.

  5. The tympanic membrane (eardrum) is a partition between the _?_ and the _?_.
    1. inner ear and the pharynx
    2. middle ear and the pharynx
    3. outer ear and the inner ear
    4. outer ear and the middle ear
      5.
    5. middle ear and the inner ear

  6. The function of the auditory tube is to...
    1. increase the pressure of vibrations that impact the inner ear
    2. decrease the pressure of vibrations that impact the inner ear
    3. keep the pressure in the middle ear cavity greater than that of the atmosphere
    4. keep the pressure in the middle ear cavity less than that of the atmosphere
    5. keep the pressure in the middle ear cavity equal to that of the atmosphere
      6.

  7. The _?_ is/are specialized to detect rotational movements of the head.
    1. cochlea
    2. semicircular canals
      3.
    3. both of the above
    4. none of the above

  8. The cornea is relatively clear because...
    1. the cells in the cornea lack nuclei
    2. the cells in the cornea lack cytoplasm
    3. the cells in the cornea are heavily keratinized
    4. the cornea is relatively lacking in cells and blood vessels
      5.

  9. True or false? The change in the shape of the lens as the eye focuses on a close object is called refraction.
    1. True.
    2. False.
      3.

  10. The _?_ is part of the retina that is involved in visual acuity ("sharpness").
    1. peripheral
    2. optic disc
    3. ciliary body
    4. fovea centralis
      5.

  11. Cones are involved in all of the following except...
    1. color vision
    2. sharp, detailed vision
    3. vision in relatively dark places
      4.

  12. Given the following key:
    1 = fibrous layer
    2 = nervous layer
    3 = vascular layer
    Which one of the following shows the layers of the eyeball in the correct sequence, from superficial (outermost) to deep (innermost)?
    1. 1-2-3
    2. 1-3-2
      3.
    3. 2-1-3
    4. 2-3-1
    5. 3-1-2

  13. When all external forces are removed, the _?_, which is elastic, tends to become relatively thick and round.
    1. lens
      2.
    2. retina
    3. cornea
    4. optic disk

  14. Which one of the following statements about the visual nerve pathways is true?
    1. The nerve fibers that originate in the retina form the optic nerves.
    2. While passing through the optic chiasma, all of the axons in each optic nerve cross to the opposite side of the body.
    3. While passing through the optic chiasma, approximately half of the axons in each optic nerve cross to the opposite side of the body.
    4. Both A. and B.
    5. Both A. and C.
      6.