PHYSIO: chapter 10 practice questions
82. The softest sound which could be heard would have an intensity of A. 0 decibels B. 0.1 decibels C. 1 decibel D. 10 decibels
A. 0 decibels
19. Which of the following is NOT a touch or pressure cutaneous receptor? A. Golgi Corpuscle B. Pacinian Corpuscle C. Merkel's Disk D. Meissner's Corpuscle
A. Golgi Corpuscle
12. _____________ receptors undergo slow adaptation. A. Tonic B. Phasic
A. Tonic
75. The cupula is part of the A. semicircular canals B. utricle C. saccule D. cochlea
A. semicircular canals
61. Which of the following is true of olfaction? A. There may be as many as a 1000 different olfactory receptor proteins B. Humans can distinguish up to 10,000 different odors C. Humans have the most acute sense of smell of all the mammals D. All apply
B. Humans can distinguish up to 10,000 different odors
93. The bending of the stereocilia of the organ of Corti opens membrane channels that are permeable to mainly ____, which causes depolarization. A. Na+ B. K+ C. Ca2+ D. All apply
B. K+
132. What new procedure is used by many people to correct refractive problems? A. lens replacement B. LASIK C. corrective lenses D. refractometry
B. LASIK
103. Sensorineural deafness can be caused by all of the following except A. excessively loud noises B. build up of wax in the ears C. damage to the cochlear nerve D. loss of hair cells in the cochlea
B. build up of wax in the ears
118. The aggregation of cystallin proteins in the lens produces A. glaucoma B. cataracts C. astigmatism D. myopia
B. cataracts
57. What causes the release of neurotransmitters from sweet and umami tastes? A. opening of extracellular Ca2+ channels B. closing of K+ channels C. release of Ca2+ from endoplasmic reticulum D. closing of Na+ channels
B. closing of K+ channels
180. Which of the following is NOT a type of cortical visual neuron? A. simple B. compound C. complex D. hypercomplex
B. compound
142. Dominant retinitis pigmentosa is characterized by A. deterioration of the striate cortex B. degeneration of photoreceptors C. degeneration of the optic nerve D. degeneration of the cornea
B. degeneration of photoreceptors
107. Sympathetic stimulation is responsible for pupil _____________ in _________ light. A. dilation, bright B. dilation, dim C. constriction, bright D. constriction, dim
B. dilation, dim
126. Myopia generally occurs when the A. eyeball is too short B. eyeball is too long C. lens is uneven D. cornea is uneven
B. eyeball is too long
17. As the magnitude of a generator potential increases the _____________ of action potentials in the sensory neuron increases. A. adaptation B. frequency C. amplitude D. sensitivity
B. frequency
83. The hertz is a measure of A. distance B. frequency C. duration D. intensity
B. frequency
95. What structure connects the scala vestibuli with the scala tympani? A. round window B. helicotrema C. oval window D. cochlear duct
B. helicotrema
30. Where do the tracts carrying impulses of proprioception and pressure cross? A. in the spinal cord at the level the axons enter the cord B. in the medulla oblongata C. in the thalamus D. the axons do not cross
B. in the medulla oblongata
174. Ganglion cells are stimulated optimally by A. light striking the entire retinal surface B. light striking a spot on the retina C. a bar of light moving on the retina D. a bar of light striking a spot on the retina
B. light striking a spot on the retina
176. Some ganglion cells of the retina contain _______ that is sensitive to luminance and helps the hypothalamus regulate circadian rhythms. A. melatonin B. melanopsin C. retinal D. photopsin
B. melanopsin
62. Which of the special senses is most closely linked with the limbic system? A. hearing B. olfaction C. taste D. vision
B. olfaction
169. Axons from the nasal portions of both eyes will decussate in the A. lateral geniculate nucleus B. optic chiasma C. superior colliculus D. striate cortex
B. optic chiasma
170. Information from both eyes is present in all of the following except the A. optic tract B. optic nerve C. optic radiation D. occipital lobe
B. optic nerve
102. Which of the following is the correct neural pathway for hearing? A. vestibulocochlear nerve, inferior colliculus, medulla oblongata, thalamus, temporal lobe B. vestibulocochlear nerve, medulla oblongata, inferior colliculus, thalamus, temporal lobe C. vestibulocochlear nerve, thalamus, inferior colliculus, medulla oblongata, temporal lobe D. None apply
B. vestibulocochlear nerve, medulla oblongata, inferior colliculus, thalamus, temporal lobe
6. Which of the following is a special sense? A. touch B. vision C. pain D. All apply
B. vision
147. What is the name of the process that re-isomerizes the all-trans retinal back to the 11-cis form? A. dark adaptation B. visual cycle of retinal C. bleaching reaction D. dark current
B. visual cycle of retinal
117. The letter 'â•'' would be projected onto the retina as A. â•' B. â•› C. â•• D. ╘
B. â•›
131. An individual with astigmatism would have their vision corrected by A. a convex lens B. a concave lens C. cylindrical lens D. a magnifying lens
C. cylindrical lens
97. What is the medium found in the cochlear canal? A. air B. perilymph C. endolymph D. ectolymph
C. endolymph
178. The optic radiations project fibers from the lateral geniculate nuclei to area A. 9 of the occipital lobe B. 19 of the occipital lobe C. 17 of the occipital lobe D. 21 of the occipital lobe
C. 17 of the occipital lobe
130. ______________ occurs when there is significant asymmetry of the cornea and/or lens. A. Myopia B. Hyperopia C. Astigmatism D. Presbyopia
C. Astigmatism
33. The __________ fibers are thin myelinated axons that carry sensations of heat, cold, and pain to the spinal cord. A. A-delta B. B-gamma C. C D. A-beta
C. C
42. Which of the following is TRUE of taste? A. Taste receptors are considered interoceptors B. Sweet is sensed at the tip of the tongue C. Chemicals must be dissolved to stimulate the taste cells D. All apply
C. Chemicals must be dissolved to stimulate the taste cells
64. Olfactory receptors are coupled to A. transducins B. Na+/Ca2+ channels directly C. G-proteins D. adenylate cyclase
C. G-proteins
32. _____________ is the perception of pain in a somatic location that is caused by damage to an internal organ and not by the activity somatic nociceptors. A. Sensory adaptation B. Lateral inhibition C. Referred pain D. Phantom limb
C. Referred pain
9. Cutaneous receptors respond to stimuli that are outside the body and are therefore also A. proprioceptors B. interoceptors C. exteroceptors D. special senses
C. exteroceptors
53. Which of the following are NOT types of tongue papillae? A. foliate papillae B. circumvallate papillae C. glossoform papillae D. fungiform papillae
C. glossoform papillae
25. Acute itch is produced by _______ binding to its receptors. A. capsaicin B. menthol C. histamine D. glutamate
C. histamine
157. Which of the following is NOT a type of cone? A. red B. blue C. yellow D. green
C. yellow
123. When an object is more than 20 feet from the eyes, A. the ciliary muscle relaxes B. there is tension on the zonular fibers of the suspensory ligament C. the lens is pulled and flattened D. All apply
D. All apply
92. The structure for hearing is the A. vestibular apparatus B. spiral organ C. organ of Corti D. Both the spiral organ and the organ of Corti are correct
D. Both the spiral organ and the organ of Corti are correct
56. What extracellular ion is necessary for release of neurotransmitter for salty and sour tastes? A. Mg2+ B. K+ C. Na+ D. Ca2+
D. Ca2+
60. Olfactory receptor proteins are especially located on the membrane of their nonmotile cilia and are coupled to A. cAMP B. cGMP C. Ca2+ D. G-proteins
D. G-proteins
109. Pupil diameter would be increased by A. contraction of the circular muscles B. contraction of the ciliary body C. contraction of the superior rectus muscle D. contraction of the radial muscles
D. contraction of the radial muscles
151. In the absence of light, there is movement of Na+ in the photoreceptors causing a depolarization. This is called the A. dark adaptation B. visual cycle of retinal C. bleaching reaction D. dark current
D. dark current
135. The optic nerve is formed from fibers of A. rods and cones B. bipolar cells C. amacrine cells D. ganglion cells
D. ganglion cells
15. The least amount of energy that produces adequate stimulation of a receptor is the A. sensory adaptation B. generator potential C. all-or-none law D. law of specific nerve energies
D. law of specific nerve energies
106. Destroying the ciliary body would prevent the _____________ from receiving nutrients. A. cornea sclera B. iris C. pupil D. lens and cornea
D. lens and cornea
7. Which type of receptor responds to physical deformation of its cell membrane? A. chemoreceptors B. photoreceptors C. thermoreceptors D. mechanoreceptors
D. mechanoreceptors
98. Which of the following is NOT true of outer hair cells of the organ of Corti? A. innervated by motor neurons B. will shorten when depolarized and lengthen when hyperpolarized C. occur in multiple rows in each turn of the cochlear duct D. relay sound information by way of the vestibulocochlear nerve
D. relay sound information by way of the vestibulocochlear nerve
101. Ablation of the superior colliculus of the midbrain would induce deafness. True / False
FALSE
84. Damage to the stapedius muscle can lead to nerve damage within the cochlea. True / False
TRUE
11. Phasic receptors adapt rapidly to maintained stimuli. True / False
TRUE
120. Contraction of ciliary muscles allows the lens to become thicker. True / False
TRUE
160. The most common form of color blindness is deuteranopia, which is congenital absence of the ____ gene. A. M B. L C. S
A. M
46. Damage to cranial nerve _____________ would limit the ability to taste sweet substances. A. VII B. V C. X D. XII
A. VII
111. What is found in the anterior cavity of the eyeball? A. aqueous humor B. blood C. vitreous humor D. pigment
A. aqueous humor
158. Which type of cone responds to short wavelengths of 420nm? A. blue cones B. green cones C. red cones
A. blue cones
143. What color of light is best absorbed by rods? A. blue-green B. red C. yellow D. purple
A. blue-green
119. Light is refracted the most by the A. cornea B. aqueous humor C. lens D. vitreous humor
A. cornea
168. Vision would be impaired by A. damage to the superior colliculus B. ablation of the medial geniculate nucleus C. damage to the temporal lobe D. damage to the vestibulocochlear nerve
A. damage to the superior colliculus
108. Long term blockage of the canal of Schlemm can induce A. glaucoma B. cataracts C. macular degeneration D. detached retina
A. glaucoma
150. Inhibiting phosphodiesterase would cause the photoreceptor to undergo A. hyperpolarization B. depolarization C. repolarization D. EPSPs
A. hyperpolarization
104. Age-related hearing impairment is known as A. presbycusis B. presbyopia C. conduction deafness D. otosclerosis
A. presbycusis
167. Which type of eye movements are high velocity (400 to 800 degrees per second)? A. saccadic B. smooth pursuit C. vergence D. papillary
A. saccadic
177. The ______ system is involved in the pupillary response. A. tectal B. geniculostriate C. optic chiasma D. sensory adaptation
A. tectal
122. Accommodation would occur when A. the muscles of the ciliary body contract B. the zonular fibers become taut C. objects move further away from the eye D. the lateral rectus muscle contracts
A. the muscles of the ciliary body contract
154. What type of G-proteins are associated with the visual cycle? A. transducins B. gustducins C. roducins D. None apply
A. transducins
94. Which of the following is NOT part of the organ of Corti? A. vestibular membrane B. tectorial membrane C. basilar membrane D. hair cells with sensory fibers
A. vestibular membrane
148. Retinaldehyde (retinal) is derived from A. vitamin A B. vitamin C C. opsin D. vitamin D
A. vitamin A
153. What causes cGMP to convert to GMP and close Na+ channels in a photoreceptor? A. dark current B. light C. darkness D. opsin
B. light
138. The tip region of the photoreceptor cells are removed by cells of the retinal pigment epithelium by A. apoptosis B. phagocytosis C. opsin D. the bleaching reaction
B. phagocytosis
113. What structure holds the lens in place? A. canal of Schlemm B. suspensory ligament C. choroid D. iris
B. suspensory ligament
139. Which of the following is NOT true of the functions of the pigment epithelium of the retina? A. absorption of scattered light B. stabilize ion composition surrounding the photoreceptors C. creating the dark current of the photoreceptors D. delivery of nutrients to the photoreceptors
C. creating the dark current of the photoreceptors
129. What condition occurs when the eyeball is too short and the focal point appears behind the eyeball? A. astigmatism B. myopia C. hyperopia D. presbyopia
C. hyperopia
156. Different layers of the __________________ analyze input from cones (and rods) differently such that one layer can add input from L and M cones to obtain information about light intensity, while another could subtract such input to obtain red-green color information. A. hypothalamus B. superior colliculi C. lateral geniculate nucleus D. red nucleus
C. lateral geniculate nucleus
165. A common visual impairment in older people that is caused by damage to the central fovea is A. geniculostriatum B. retinitis pigmentosa C. macular degeneration D. bleaching
C. macular degeneration
115. What area of the retina has no photoreceptors? A. fovea centralis B. macula C. optic disc D. None apply
C. optic disc
85. Which of the following is NOT an auditory ossicle? A. incus B. malleus C. otolith D. stapes
C. otolith
136. Within the eye, electrical impulses pass from A. photoreceptors to ganglion cells to bipolar cells B. ganglion cells to bipolar cells to photoreceptors C. photoreceptors to bipolar cells to ganglion cells D. bipolar cells to photoreceptors to ganglion cells
C. photoreceptors to bipolar cells to ganglion cells
146. Which cells have the ability to re-isomerize the all-trans retinal back to the 11-cis form? A. photoreceptor cells B. ganglion cells C. pigment epithelial cells D. bipolar cells
C. pigment epithelial cells
116. The bending of light as it passes through different media is called A. accommodation B. visual acuity C. refraction D. astigmatism
C. refraction
110. The outermost layer of the eyeball is the A. choroid B. retina C. sclera D. lens
C. sclera
112. What is found in the posterior cavity of the eyeball? A. aqueous humor B. blood C. vitreous humor D. pigment
C. vitreous humor
80. Which of the following is true of vestibular nystagmus? A. It consists of involuntary oscillations of the eyes B. It may be a symptom of Ménière's disease C. It is loss of equilibrium D. All apply
D. All apply
134. _____________ in the retina connect photoreceptors and ganglion cells. A. Horizontal cells B. Retinal epithelium C. Amacrine cells D. Bipolar cells
D. Bipolar cells
127. Loss of accommodation with age is A. astigmatism B. myopia C. hyperopia D. presbyopia
D. presbyopia
173. What type of eye movement helps you to follow a moving object? A. vergence B. saccadic C. fixational D. smooth pursuit
D. smooth pursuit
166. Eye movements are regulated by information sent to the A. lateral geniculate nucleus B. hypothalamus C. inferior colliculus D. superior colliculus
D. superior colliculus
105. A cochlear implant may help someone with conduction deafness. True / False
FALSE
114. The lens is clear with no blood because it is made of dead cells. True / False
FALSE
121. The near point of vision decreases with increasing age. True / False
FALSE
128. Hyperopia is corrected with a concave lens. True / False
FALSE
133. LASIK surgery can correct for all types of refractive problems. True / False
FALSE
137. Rods and cones face to the front of the eyeball (toward the incoming light). True / False
FALSE
140. Bleaching induces conformational changes in both retinal and the associated opsin. True / False
FALSE
144. Light energy will cause all-trans retinal to convert to the 11-cis form which dissociates from opsin to eventually create the nerve impulse. True / False
FALSE
145. Photoreceptors have the enzyme to re-isomerize the all-trans retinal back to the 11-cis form. True / False
FALSE
161. The M and L cones are coded on chromosome 7 making the lack of the M and L photopsins more prevalent in females. True / False
FALSE
163. The fovea centralis contains only rods. True / False
FALSE
172. In the geniculostriate system, the right lateral geniculate nucleus receives input from the right visual fields of both eyes. True / False
FALSE
124. Being able to distinguish separate trees in the forest is an example of the resolving power of visual acuity. True / False
TRUE
125. Myopia is corrected with concave lenses. True / False
TRUE
141. Only absorbed light can produce photochemical reactions that result in vision. True / False
TRUE
149. The generator potential produced in photoreceptors is a hyperpolarization. True / False
TRUE
152. In the dark, the photoreceptors release an inhibitory neurotransmitter that prohibits bipolar neurons from exciting ganglion neurons. True / False
TRUE
155. The wavelengths of light a photoreceptor responds to is determined by the opsin in the photoreceptor. True / False
TRUE
159. M cones are medium length green cones. True / False
TRUE
16. The magnitude of the generator potential is directly proportional to the frequency of the action potentials being produced. True / False
TRUE
162. Each cone communicates with only one ganglion cell while many rods communicate with one ganglion cell. True / False
TRUE
164. Those who suffer from macular degeneration lose clarity of vision provided by the fovea. True / False
TRUE
171. The geniculostriate system tells you what you are seeing, while the tectal system tells you where the object is. True / False
TRUE
175. Some ganglion cells are stimulated by light at the center of its receptive field while others are stimulated by light at the periphery of its receptive field. This improves visual acuity. True / False
TRUE
179. The receptive field affected by cones is much smaller than the receptive field of rods. True / False
TRUE
181. Receptive fields of simple neurons are rectangular because they are best suited to stimulation from a slit of light. True / False
TRUE
2. Functional classes of sensory receptors include chemoreceptors and thermoreceptors. True / False
TRUE
24. The capsaicin receptor produces both heat and pain sensations by allowing Ca2+ and Na+ to diffuse into the neuron through transient receptor potential channels. True / False
TRUE
26. Nociceptors relay sensory information to the cortex via the lateral spinothalamic tract. True / False
TRUE
36. Areas of the skin with small receptive fields would have a greater sensory acuity. True / False
TRUE
37. The palm of the hand would have a higher receptor density than the upper arm. True / False
TRUE
77. There are stones in the inner ear. True / False
TRUE
96. A greater bending of the stereocilia will increase the frequency of action potentials and will be perceived as a louder sound. True / False
TRUE
182. Match the type of receptor with the stimulus that would activate it. nociceptors burning your mouth 1. thermoreceptors 2. photoreceptors 3. chemoreceptors 4. mechanoreceptors
smell of pizza 3 a refreshing cold drink 1 a pat on the back 4 seeing an old friend 2
183. Match the cutaneous receptor with the sensation it responds to. 1. free nerve endings 2. Meissner's corpuscles 3. Ruffini corpuscles 4. Pacinian corpuscles 5. Merkel's discs
texture and slow vibration 2 sustained pressure 3 deep pressure and fast vibration 4 light tough, temperature, and pain 1 sustained touch and pressure 5
35. Impulses of pain are also transmitted to the _____ which is part of the limbic system. A. cingulate gyrus B. amygdala C. hippocampus D. caudate nucleus
A. cingulate gyrus
69. Which of the following is NOT part of the vestibular apparatus of the inner ear? A. cochlea B. utricle C. semicircular canals D. saccule
A. cochlea
99. What neurotransmitter is released by the inner hair cells once they have depolarized? A. glutamate B. acetylcholine C. ATP D. norepinephrine
A. glutamate
14. The law of specific nerve energies can be used to explain A. phantom limbs B. paradoxical cold C. sensory adaptation D. lateral inhibition
B. paradoxical cold
100. What role do outer hair cells play in the transmission of sound? A. They dampen strong vibrations from very loud sounds B. They bend and depolarize with specific wavelengths of sound waves C. They amplify softer sound and sharpen pitch perception D. All apply
C. They amplify softer sound and sharpen pitch perception
81. Which of the following structures are important to the maintenance of balance and equilibrium? A. eyes B. proprioceptors from joints and muscles C. vestibular apparatus D. All apply
D. All apply
71. When stereocilia are bent toward the kinocilium, the cell membrane will be A. hyperpolarized B. depolarized C. releasing increased amounts of neurotransmitter D. Both depolarized and releasing increased amounts of neurotransmitter are correct
D. Both depolarized and releasing increased amounts of neurotransmitter are correct
18. The potential produced by sensory receptors is called a A. local potential B. generator potential C. receptor potential D. Both generator and receptor potentials are correct
D. Both generator and receptor potentials are correct
48. Which of the following cranial nerves conveys gustatory information? A. facial B. glossopharyngeal C. hypoglossal D. Both the facial and glossopharyngeal are correct
D. Both the facial and glossopharyngeal are correct
22. The capsaicin receptor serves as both an ion channel and a receptor for the molecule in chili peppers that causes sensations of A. heat and pain B. cold and pain C. pressure and pain D. heat and pressure
A. heat and pain
31. Where do the fibers of the spinothalamic tracts cross? A. in the spinal cord at the level the axons enter the cord B. in the medulla oblongata C. in the thalamus D. the axons do not cross
A. in the spinal cord at the level the axons enter the cord
10. Chemoreceptors that monitor blood glucose levels are also A. interoceptors B. proprioceptors C. special senses D. exteroceptors
A. interoceptors
28. Transmission of thermal sensations to the sensory cortex would be impaired by damage to the A. lateral spinothalamic tract B. anterior spinothalamic tract C. medial lemniscus tract D. anterior spinocerebellar tract
A. lateral spinothalamic tract
8. Which of the following is NOT a cutaneous receptor? A. muscle spindle B. touch receptor C. heat receptor D. pain receptor
A. muscle spindle
40. The ________________ phenomenon refers to amputees reporting sensations in limbs that are no longer there. A. phantom limb B. lateral inhibition C. referred pain D. adaptation
A. phantom limb
52. Where on the cerebral cortex is taste information sent? A. prefrontal cortex, postcentral gyrus, and insula B. temporal lobe, precentral gyrus, and prefrontal cortex C. thalamus, insula, and postcentral gyrus D. medulla oblongata, insula, and thalamus
A. prefrontal cortex, postcentral gyrus, and insula
58. What causes the release of neurotransmitter when bitter taste has stimulated a taste cell? A. release of Ca2+ from endoplasmic reticulum B. opening of extracellular Ca2+ channels C. closing K+ channels D. closing Na+ channels
A. release of Ca2+ from endoplasmic reticulum
50. Which taste modality involves membrane receptors that are coupled to G-proteins? A. umami B. salty C. sour D. All apply
A. umami
68. The structures that function in equilibrium are known as the A. vestibular apparatus B. cochlea C. bony labyrinth D. organ of Corti
A. vestibular apparatus
49. Gustducin A. is an olfactory G-protein B. is related to transducin of the eye C. activates second-messenger systems that hyperpolarize the receptor cell D. All apply
B. is related to transducin of the eye
89. The scala vestibuli of the cochlea is filled with A. endolymph B. perilymph C. ectolymph D. mesolymph
B. perilymph
38. As ____________ increases, the two-point threshold decreases. A. receptor number B. receptor density C. receptor sensitivity D. receptor sensation
B. receptor density
79. Vertigo occurs due to activation of the A. utricle B. semicircular canals C. saccule D. cochlea
B. semicircular canals
67. What is the role of sustentacular cells in the olfactory epithelium? A. produce new bipolar receptor cells B. to oxidize volatile hydrophobic odorant molecules to make them less soluble C. to repair damaged receptor cells D. to form basal stem cells
B. to oxidize volatile hydrophobic odorant molecules to make them less soluble
1. Which of the following statements is true? A. Our senses can perceive a wide range of energies B. Different modalities of sensations have different types of impulses C. Sensory receptors transduce different forms of physical energy to nerve impulses D. The brain cannot distinguish between impulses of cold and heat
C. Sensory receptors transduce different forms of physical energy to nerve impulses
5. Damage to cutaneous receptors would limit the ability to detect all of the following except A. pain B. thermal sensations C. body position D. touch
C. body position
23. The ________________________ is a membrane ion channel on sensory neurons that responds to cold in the 8º to 28ºC range by producing a depolarization. A. capsaicin receptor B. two-point threshold C. cold or menthol receptor D. pacinian corpuscle
C. cold or menthol receptor
39. Sensations are sharpened via A. two-point discrimination B. adaptation C. lateral inhibition D. phantom limb
C. lateral inhibition
76. Otoliths are associated with the A. crista ampullaris B. cupula C. macula D. semicircular canals
C. macula
29. Proprioception and pressure impulses are carried by large, _______ neurons in the ______ columns of the spinal cord and are ____. A. myelinated, ventral, contralateral B. unmyelinated, lateral, ipsilateral C. myelinated, dorsal, ipsilateral D. unmyelinated, dorsal, contralateral
C. myelinated, dorsal, ipsilateral
59. Information obtained via _____________ is transmitted directly to the limbic system. A. gustation B. audition C. olfaction D. touch
C. olfaction
13. Having the ability to ignore constant phasic stimuli is called A. the law of specific nerve energies B. tonic adaptation C. sensory adaptation D. phasic adaptation
C. sensory adaptation
21. Nociceptors may be either myelinated or unmyelinated and function to carry pain sensations to the spinal cord using ____________ and ________________ as neurotransmitters. A. substance P, norepinephrine B. glutamate, acetylcholine C. substance P, glutamate D. acetylcholine, substance P
C. substance P, glutamate
34. How many neurons conduct sensory impulses from the periphery to the postcentral gyrus? A. one B. two C. three D. four
C. three
86. Which of the following is true of the auditory tube? A. It is a passageway from the middle ear to the oropharynx B. It is usually collapsed C. It opens due to the action of the tensor tympani muscle D. Both it is usually collapsed and it opens due to the action of the tensor tympani muscle
D. Both it is usually collapsed and it opens due to the action of the tensor tympani muscle
70. What characteristic does the endolymph of the membranous labyrinth have that is unusual? A. It is similar to the perilymph that surrounds the membranous labyrinth B. It has a higher than normal concentration of Na+ C. It has a lower than normal concentration of Cl- D. It has a higher than normal concentration of K+
D. It has a higher than normal concentration of K+
41. Chemoreceptors that respond to chemical changes in the external environment are called A. interoceptors B. nociceptors C. proprioceptors D. exteroceptors
D. exteroceptors
55. Where is the primary gustatory cortex? A. postcentral gyrus of the parietal lobe B. prefrontal cortex C. temporal lobe D. insula
D. insula
78. Stimulation of the hair cells of the vestibular apparatus sends impulses to the cerebellum and _________ by way of the vestibulocochlear nerve. A. cerebrum B. midbrain C. pons D. medulla oblongata
D. medulla oblongata
87. Vibrations in the stapes directly induce vibrations in the A. tympanic membrane B. incus C. round window D. oval window
D. oval window
51. Specialized cells on the tongue that distinguish salty, sour, sweet, meaty, or bitter flavors are called A. taste buds B. umami cells C. gustducin D. taste cells
D. taste cells
20. Encapsulated cutaneous receptors are used to detect thermal sensations. True / False
FALSE
4. An individual would normally perceive pain when the chemoreceptors are stimulated. True / False
FALSE
43. Solutions containing a high concentration of hydrogen ions would maximally stimulate taste buds for sweet. True / False
FALSE
45. Monosodium glutamate stimulates bitter taste receptors. True / False
FALSE
47. A given gustatory sensory neuron may be stimulated by more than one taste cell located in a number of different taste pores. True / False
FALSE
54. Taste cells are modified neurons. True / False
FALSE
63. Each olfactory glomerulus receives input from several types of olfactory receptors. True / False
FALSE
72. Inability to detect rotational acceleration occurs when the saccule is damaged. True / False
FALSE
73. Nodding your head up and down would stimulate receptors in the utricle. True / False
FALSE
88. Conduction deafness occurs due to loss of hair cells in the cochlea. True / False
FALSE
90. The function of the inner hair cells of the organ of Corti is to amplify low sound intensities. True / False
FALSE
27. Second-order neurons from the medial lemniscus and spinothalamic tracts synapse with third-order neurons in the thalamus. True / False
TRUE
3. Proprioceptors allow for individuals to determine the position of a limb or body part. True / False
TRUE
44. Sweet, umami, and bitter receptors activate gustducin G-proteins that lead to depolarization. True / False
TRUE
65. Basal stem cells in the olfactory epithelium produce new olfactory receptors every one to two months. True / False
TRUE
66. The opening of Na+/Ca2+ channels by cAMP produces a graded depolarization in the olfactory bulb. True / False
TRUE
74. As the endolymph in the semicircular canals bends the cupula, the stereocilia are stimulated. True / False
TRUE
91. Damage to the tectorial membrane near the oval window would limit an individual's ability to detect high frequency sounds. True / False
TRUE
