Reading Guided - Sensory Physiology II
1. Which taste modality involves membrane receptors that are coupled to G-proteins? A. umami B. salty C. sour D. All of the choices are correct. 2. Nociceptors relay sensory information to the cortex via the lateral spinothalamic tract. True False 3. 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. 4. 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 5. Loss of accommodation with age is A. astigmatism. B. myopia. C. hyperopia. D. presbyopia. 6. What extracellular ion is necessary for release of neurotransmitter for salty and sour tastes> A. Mg2+ B. K+ C. Na+ D. Ca2+
7. 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
8. Phasic receptors adapt rapidly to maintained stimuli. True False
9. 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 of the choices are important.
10. Information obtained via _____________ is transmitted directly to the limbic system. A. gustation B. audition C. olfaction D. touch
11. 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 12. Damage to cutaneous receptors would limit the ability to detect all of the following except A. pain. B. thermal sensations. C. position. body D. touch. 13. 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
14. Vibrations in the stapes directly induce vibrations in the A. tympanic membrane. B. incus. C. round window. D. oval window.
15. Which of the following is NOT a type of cortical visual neuron? A. simple B. compound C. complex D. hypercomplex
16. The magnitude of the generator potential is directly proportional to the frequency of the action potentials being produced. True False 17. Light is refracted the most by the A. cornea. B. aqueous humor. C. lens. D. vitreous humor. 18. Damage to the tectorial membrane near the oval window would limit an individual's ability to detect high frequency sounds. True False 19. What neurotransmitter is released by the inner hair cells once they have depolarized? A. glutamate B. acetylcholine C. ATP D. norepinephrine
20. 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
21. Encapsulated cutaneous receptors are used to detect thermal sensations. True False
22. The function of the inner hair cells of the organ of Corti is to amplify low sound intensities. True False
23. 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.
24. Vertigo occurs due to activation of the A. utricle. B. semicircular canals. C. saccule. D. cochlea. 25. What color of light is best absorbed by rods? A. blue-green B. red C. yellow D. purple