Quiz Special Senses1. Accessory glands that produce an oily secretion are thea. conjunctivab. lacrimal glandsc. tarsal glands.2. The portion of the fibrous layer that is white and opaque is thea. choroidb. corneac. retinad. sclera.3. Which sequence best describes a normal route for the flow of tears from the eyes into the nasal cavity? a. lacrimal canaliculi, lacrimal sacs, nasolacrimal ductsb. lacrimal ducts, lacrimal canaliculi, nasolacrimal ductsc. nasolacrimal ducts, lacrimal canaliculi, lacrimal sacs.4. Activation of the sympathetic nervous system causesa. contraction of the sphincter pupillae musclesb. contraction of the dilator pupillae musclesc. contraction of the ciliary musclesd. a decrease in ciliary zonule tension.5. Damage to the medial recti muscles would probably affecta. accommodationb. refractionc. convergenced. pupil constriction.6. The phenomenon of dark adaptation is best explained by the fact that a. rhodopsin does not function in dim lightb. rhodopsin breakdown occurs slowlyc. rods exposed to intense light need time to generate rhodopsind. cones are stimulated to function by bright light.7. Blockage of the scleral venous sinus might result in a. a styb. glaucomac. conjunctivitisd. a cataract.8. Nearsightedness is more properly called a. myopiab. hyperopiac. presbyopiad. emmetropia.9. Of the neurons in the retina, the axons of which of these form the optic nerve? a. bipolar cellsb. ganglion cellsc. cone cellsd. horizontal cells.10. Which sequence of reactions occurs when a person looks at a distant object? a. pupils constrict, ciliary zonule (suspensory ligament) relaxes, lenses become less convex b. pupils dilate, ciliary zonule becomes taut, lenses become less convexc. pupils dilate, ciliary zonule becomes taut, lenses become more convexd. pupils constrict, ciliary zonule relaxes, lenses become more convex.11. During embryonic development, the lens of the eye formsa. as part of the choroid coatb. from the surface ectoderm overlying the optic cupc. as part of the sclera, d. from mesodermal tissue.12. The blind spot of the eye is a. where more rods than cones are foundb. where the macula lutea is locatedc. where only conesoccurd. where the optic nerve leaves the eye.13. Olfactory tract damage would probably affect your ability toa. seeb. hearc. feel paind. smell.14. Sensory impulses transmitted over the facial, glossopharyngeal, and vagus nerves are involved in the sensation of a. tasteb. touchc. equilibriumd. smell.15. Taste buds are found on the a. anterior part of the tongue, b. posterior part of the tongue, c. palate, d. all of these.16. Gustatory epithelial cells are stimulated bya. movement of otoliths, b. stretch, c. substances in solution, d. photons of light.17. Cells in the olfactory bulb that act as local integrators of olfactory inputs are the a. hair cells, b. amacrine granule cells, c. olfactory stem cells, d. mitral cells, e. supporting cells.18. Olfactory nerve filaments are found a. in the optic bulbs, b. passing through the cribriform plate of the ethmoid bone, c. in the optic tracts, d. in the olfactory cortex.19. Conduction of sound from the middle ear to the internal ear occurs via vibration of the a. malleus against the tympanic membrane, b. stapes in the oval window, c. incus in the round window, d. stapes against the tympanic membrane.20. The transmission of sound vibrations through the internal earoccurs chiefly through a. nerve fibers, b. air, c. fluid, d. bone.21. Which of the following statements does not correctly describe the spiral organ? a. Sounds of high frequency stimulate hair cells at the basal end, b. the hairs of the receptor cells are embedded in the tectorial membrane, c. the basilar membrane acts as a resonator, d. the more numerous outer hair cells are largely responsible for our perception of sound.22. Pitch is to frequency of sound as loudness is toa. quality, b. intensity, c. overtones, d. all of these.23. The structure that allows pressure in the middle ear to be equalized with atmospheric pressure is the a. pinna, b. pharyngotympanic tube, c. tympanic membrane,d. oval window.24. Which of the following is important in maintaining the balance of the body? a. visual cues, b. semicircular canals, c. the saccule, d. proprioceptors, e. all of these.25. Equilibrium receptors that report the position of the head in space relative to the pull of gravity are a. spiral organs,b. maculae, c. cristae ampullares, d. otoliths.26. Which of the following is not a possible cause of conduction deafness? a. impacted cerumen, b. middle ear infection, c. cochlear nerve degeneration, d. otosclerosis.27. Which of the following are intrinsic eye muscles? a. superior rectus, b. orbicularis oculi, c. smooth muscles of the iris and ciliary body, d. levator palpebrae superioris.28. Which lies closest to the exact posterior pole of the eye?a. optic nerve, b. optic disc, c. macula lutea, d. point of entry of central artery into the eye.29. Otoliths (ear stones) are a. a cause of deafness, b. a type of hearing aid, c. important in equilibrium, d. the rock-hard petrous temporal bones.

Review Questions 1. c; 2. d; 3. a; 4. b; 5. c; 6. c; 7. b; 8. a; 9. b; 10. b;11. b; 12. d; 13. d; 14. a; 15. d; 16. c; 17. d; 18. b; 19. b; 20. c; 21. d; 22. b; 23. b; 24. e; 25. b; 26. c; 27. c; 28. c; 29. c