Biomed 100 Practice Quiz
Chapter 10, Fall 2007

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Multiple Choice - One Correct Choice Per Question

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1. The _?_ is an air-filled space spanned by the _?_.
   1. middle ear / ossicles
   2. middle ear / cochlear duct
   3. inner ear / ossicles
   4. inner ear / cochlear duct
   5. inner ear / semicircular canals
   
   
2. The _?_ is most directly attached to the oval window
   1. malleus bone
   2. incus bone
   3. stapes bone
   4. stapedius muscle
   5. tensor tympani muscle
   
   
3. The receptor cells for hearing are located in the
   1. ossicles
   2. auditory tube
   3. spiral organ (organ of Corti)
   4. all of the above
   5. none of the above
   
   
4. The labyrinth
   1. is located in the inner ear
   2. contains receptors for hearing
   3. contains receptors for equilibrium ("sense of balance")
   4. both B. and C.
   5. all of the above
   
   
5. The _?_ is the partition between the outer ear and the middle ear.
   1. ciliary body
   2. spiral organ
   3. tympanic membrane
   4. membranous labyrinth
   
   
6. Which one of the following occurs in response to very loud sounds?
   1. Contraction of muscles in middle ear.
   2. Relaxation of muscles in middle ear.
   3. Movement of air through auditory tube toward middle ear.
   4. Movement of air through auditory tube toward pharynx (throat).
   
   
7. True or false? Normal hearing requires that the surface area of the stapes / oval window be approximately equal to the surface area of the tympanic membrane (eardrum).
   1. True.
   2. False.
   
   
8. It is passage of air primarily through the _?_ that equalizes pressures and causes the ears to "pop."
   1. auditory tube
   2. cochlear duct
   3. tympanic membrane
   4. external auditory canal
   
   
9. The _?_ is/are located in the inner ear and attached to fibers of sensory neurons.
   1. ossicles
   2. hair cells
   3. ciliary muscle
   4. suspensory ligaments
   5. both C. and D.
   
   
10. The transparency of the cornea is due mainly to its relative lack of _?_.
    1. cells
    2. blood vessels
    3. refraction
    4. both A. and B.
    5. all of the above
    
    
11. The shape of the lens is affected most by the
    1. angle at which an object is viewed
    2. amount of light in the environment
    3. color of the object being viewed
    4. distance to the object being viewed
    
    
12. The greatest visual acuity ("sharpest vision") occurs when images are focused on the
    1. iris
    2. choroid
    3. optic disc
    4. ciliary body
    5. fovea centralis / macula lutea
    
    
13. Which of the following pairs is not correct?
    1. sharp images - rods
    2. color vision - cones
    3. fovea centralis - cones
    4. outer edge of retina - rods
    
    
14. The correct sequence in the layers of the eye, from outermost to innermost, is
    1. fibrous tunic - retina - vascular tunic
    2. fibrous tunic - vascular tunic - retina
    3. vascular tunic - retina - fibrous tunic
    4. vascular tunic - fibrous tunic - retina
    5. none of the above
    
    
15. The _?_ is not one of the eye structures directly involved in accommodation for near vision.
    1. lens
    2. ciliary muscle
    3. radial muscle of iris
    4. suspensory ligament
    
    
16. A relatively "thick and round" convex lens (surface curved outward) could be described as
    1. strongly converging (focuses light inward toward a point)
    2. strongly diverging (focuses light outward, away from a point)
    3. weakly converging (focuses light inward toward a point)
    4. weakly diverging (focuses light outward, away from a point)