Biomed 107 Practice Quiz
Chapter 19, Spring 2008
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  1. Which of the following is not one of the three layers, or tunics, of the eye?
    1. neural
    2. fibrous
    3. vascular
    4. ocular conjunctiva

  2. Which one of the following is not part of the vascular tunic of the eye?
    1. iris
    2. macula
      3.
    3. choroid
    4. ciliary body

  3. Smooth muscle in the _?_ controls the diameter of the pupil, while smooth muscle in the _?_ controls the diameter of the lens.
    1. macula / choroid
    2. ciliary body / iris
    3. iris / ciliary body
    4. ciliary body / macula
    5. suspensory ligaments / iris

  4. Given the following key for major cells types in the retina:
    1=bipolar cells
    2=photoreceptors
    3=ganglion cells
    What is the correct sequence in the transmission of electrical signals?
    1. 1-2-3
    2. 1-3-2
    3. 2-1-3
      4.
    4. 2-3-1
    5. 3-2-1

  5. Visual information is processed (consciously or subconsciously) in the
    1. optic chiasm
    2. lateral geniculate nuclei of thalamus
    3. occipital lobes
    4. both A. and C.
    5. both B. and C.
      6.

  6. True or false? While the ciliary muscle is at rest, tension in the suspensory ligaments of the lens "flattens" the lens, focusing the eye for distant vision
    1. True.
      2.
    2. False.

  7. The fovea centralis of the retina is noted for
    1. its capacity for color vision and visual acuity ("clear, sharp" vision)
      2.
    2. the large number of axons located there that connect the retina to the optic nerve
    3. both of the above
    4. none of the above

  8. Which one of the following is constantly produced and constantly returned to circulation by venous vessels in an adult?
    1. endolymph
    2. aqueous humor
      3.
    3. vitreous humor
    4. both A. and C.
    5. both B. and C.

  9. Which statement is not true of the vestibular complex?
    1. includes the cochlea / cochlear duct
      2.
    2. includes the utricle and saccule
    3. includes the semicircular canals / semicircular ducts
    4. is involved in the sense of equilibrium

  10. The malleus, incus, and stapes are located in the
    1. bony labyrinth
    2. membranous labyrinth
    3. tympanic cavity
      4.
    4. vestibular complex

  11. The oval window and round window are passages between the _?_ and _?_.
    1. external ear and middle ear
    2. middle ear and internal ear
      3.
    3. middle ear and pharynx (via auditory tube)
    4. inner ear and pharynx (via auditory tube)

  12. Within the cochlea, the receptors known as _?_ are components of the spiral organ
    1. ossicles
    2. otoliths
    3. hair cells
      4.
    4. semicircular ducts

  13. The medial surface of the tympanic membrane is lined by
    1. skin
    2. a mucous membrane
      3.
    3. endolymph
    4. perilymph
    5. aqueous humor

  14. What passes through the auditory (pharyngotympanic) tube?
    1. the cochlear duct
    2. the cochlear branch of the vestibulocochlear nerve
    3. small amounts of perilymph
    4. small amounts of air and mucus
      5.
    5. nothing (it is sealed by the secondary tympanic membrane)

  15. Which statement is true?
    1. The "labyrinths" of the internal ear are located in the petrous portion of the temporal bone.
    2. The "bony labyrinth" is located within the "membranous labyrinth."
    3. The "membranous labyrinth" is located within the "bony labyrinth."
    4. A. and B. are true.
    5. A. and C. are true.
      6.

  16. The auditory pathway involved in hearing includes nuclei located in the
    1. brainstem
    2. thalamus
    3. both of the above
      4.
    4. none of the above (the auditory pathway involved in conscious perception of sound passes directly from the inner ear to the cerebral cortex)