BMS100 Past Test Questions
Chapter 10, Fall 2008
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  1. Which statement is true of mechanoreceptors?
    1. they respond to being stretched or compressed, or changes in pressure
    2. they include the rods and cones of the eye
    3. they include the hair cells of the inner ear
    4. both A and B
    5. both A and C

  2. Which structure(s) have the greatest capacity to "intensify" (increase the pressure of) vibrations passing through the ear?
    1. semicircular canals
    2. ossicles (hammer/anvil/stirrup)
    3. auditory tube that passes to throat
    4. stapedius and tensor tympani muscles

  3. The bone known as the stapes or stirrup is in direct contact with
    1. the eardrum and the bone known as the incus (anvil)
    2. the medial (inner) semicircular canal
    3. the lateral (outer) semicircular canal
    4. the bone known as the incus (anvil) and the oval window of the inner ear
    5. the hair cells of the inner ear

  4. The receptors involved in hearing are called _?_ and are located in the _?_.
    1. ossicles / cochlea
    2. ossicles / auditory tube
    3. hair cells / cochlea
    4. hair cells / auditory tube

  5. The muscles in the middle ear are most likely to contract if or when
    1. the ear is exposed to loud sound
    2. a person is struggling to hear a very soft sound
    3. the head is tilted
    4. the head is rotating
    5. the pressure in the middle ear is not equal to the pressure of the atmosphere

  6. The "auditory tube" allows pressures in the _? to equalize.
    1. outer ear and labyrinth
    2. outer ear and middle ear cavity
    3. middle ear cavity and inner ear
    4. atmosphere and cochlear duct
    5. cochlea and semicircular canals

  7. The "labyrinth" of the ear
    1. connects the middle ear to the pharynx (throat)
    2. is a complex set of ducts and chambers in the inner ear
    3. is a complex set of tiny bones and muscles attached to them
    4. is an outgrowth of the pharynx (throat) that improves hearing sensitivity by increasing the "pressure" of sound waves

  8. The partition between the outer ear and the middle ear is the
    1. labyrinth
    2. round window
    3. oval window
    4. tympanum (eardrum)
    5. ossicle known as the stapes ("stirrup")

  9. Each ear contains thousands of _?_ that are positioned between two vibrating membranes and directly connected to sensory neurons.
    1. ossicles
    2. hair cells
    3. oval windows
    4. photoreceptors
    5. semicircular ducts

  10. The cornea is
    1. transparent and refractive (able to "bend" light rays)
    2. transparent but nonrefractive (unable to "bend" light rays)
    3. connected to the ciliary muscle and the suspensory ligaments
    4. the part of the eye that constricts or dilates in response to varying light intensities

  11. When the ciliary muscle contracts, the curvature (roundness) of the lens increases. This is most directly involved in
    1. increasing the field of peripheral vision
    2. adjusting the eye for vision in a bright environment
    3. adjusting the eye to see an object that is close to the face
    4. directing the light rays to the optic disc for enhanced vision

  12. The photoreceptors known as cones are
    1. more concentrated in the central part of the retina
    2. more concentrated in the peripheral part of the retina
    3. equally distributed throughout the retina
    4. located in the optic nerve, not the retina

  13. A slight amount of pressure in the eyeball
    1. dilates the pupil for vision in relatively dark environments
    2. pulls the lens into a relatively flat shape when viewing distant objects.
    3. pulls the retina into a relatively flat shape that enhances peripheral vision
    4. is a serious disorder than can lead to blindness.

  14. The human eye does not contain
    1. "red cones" (cones that are most sensitive to red light)
    2. "yellow cones" (cones that are most sensitive to yellow light)
    3. "green cones" (cones that are most sensitive to green light)
    4. "blue cones" (cones that are most sensitive to blue light)

  15. Which one of the following statements is false?
    1. The outer layer of the eyeball includes the sclera (white) and cornea.
    2. The middle layer of the eyeball includes a bright pigment that improves vision by reflecting light within the eyeball.
    3. The innermost layer of the eyeball is the retina.

  16. If a person has brown eyes...
    1. the iris is brown and the pupil appears black
    2. the pupil is brown and the iris appears black
    3. the cornea is brown and both the iris and the pupil are black
    4. both the iris and the pupil are brown and the optic disc appears black

  17. The function of the suspensory ligaments is to "suspend" the
    1. cornea
    2. pupil
    3. lens
    4. retina
    5. optic nerve

  18. In passing from the eye to the brain, _?_ of the nerve fibers (axons) in the visual pathway cross to the opposite side (right to left or left to right).
    1. all
    2. approximately one half
    3. none