Chapter 17
Practice Quiz
1. T F The upper limit of light adaptation is 10 million fold.
2. T F All of the visual inputs cross over at the optic chiasm.
3. T F The fovea is the area of highest visual acuity due to a high number of cones.
4. T F The are 2 "R" groups for the three cone modalities.
5. T F Trans-retinal is the substance to cause and action potential in the retina.
6. T F The primary area of refraction is the lens.
7. T F Myopia is corrected by a convex lens
8. T F cGMP is present in rods during dim light to bring about the release of glutamate which hyperpolarizes the sensory nerve.
9. T F Cortical cataracts are caused most commonly by diabetes.
10. T F Phacoemulsification is one treatment for glaucoma.
11. T F The visual acuity
of someone who can only fix with a patch over their good eye is:
A. 20/20
B. 20/30
C. 20/50
D. 20/100
E. 20/200
12. The cranial nerves associated
with non-paralytic strabismus is (are):
A. 3
B. 4
C. 6
D.all of the above
E. none of the above
13. Recession and resection
is a treatment for:
A. glaucoma
B. cataract
C. astigmatism
D. macular degeneration
E. none of the above
14. Eyesight is harmed by:
A. watching TV too closely
B. reading in the dark
C. not wearing prescription glasses
D. wearing someone elses's prescription glasses
E. none of the above
15. The normal ratio for
a Rinne test is _______ air to bone conduction.
A. 1:2
B. 2:1
C. 1:4
D. 4:1
E. none of the above
16. The taste bud shape
most like an inverted mushroom is _________________.
A. circumvallate
B. fungiform
C. filiform
D. goblet cell
E. none of the above
17. The percentage of air
that passes the nasal epithelium during normal inspiration is _________________%
A. 0
B. 1
C. 2
D. 4
E. 6
18. The tympanic membrane
is _______ times larger than the oval window.
A.2
B.3
C.6
D.11
E.22
19. The membrane that vibrates
when sound enters the ear is the______________
A. scala vestibuli
B. scala tympani
C. vestibular
D. tectorial
E. basilar
20. The _________ acts as
a pressure relief valve for hearing.
A. tympanic membrane
B. round window
C. oval window
D. all of the above
E. none of the above
21. The range of human hearing
is _____________ hertz
A. 0-1500
B. 1500-4000
C.1-20000
D.20-20000
E. none of the above