Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 34.6, Problem 1TYK
Summary Introduction
Introduction:
Glaucoma is a visual disorder in which the optic nerve gets damaged. It is a leading cause of blindness for the individual over the age of sixty. Vision loss of an individual due to glaucoma cannot be recovered. If it is recognized in an early-stage, vision loss can be prevented or slowed.
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Explain why one early symptom of vitamin A deficiency is impaired vision at night (often called night blindness).
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Chapter 34 Solutions
Principles of Biology
Ch. 34.1 - Prob. 1BCCh. 34.1 - Prob. 1TYKCh. 34.2 - Prob. 1BCCh. 34.2 - Prob. 2BCCh. 34.2 - Prob. 1CCCh. 34.2 - Prob. 1TYKCh. 34.2 - Prob. 2TYKCh. 34.3 - Prob. 1CCCh. 34.3 - Prob. 1TYKCh. 34.4 - Prob. 1CC
Ch. 34.4 - Prob. 2CCCh. 34.4 - Prob. 1TYKCh. 34.4 - Prob. 2TYKCh. 34.5 - Prob. 1CCCh. 34.5 - Prob. 1TYKCh. 34.5 - Prob. 2TYKCh. 34.6 - Prob. 1TYKCh. 34.6 - Prob. 2TYKCh. 34 - Prob. 1TYCh. 34 - Prob. 2TYCh. 34 - The sensory receptors for audition (hearing) are...Ch. 34 - In an experiment to test the function of...Ch. 34 - Prob. 5TYCh. 34 - Prob. 6TYCh. 34 - Prob. 7TYCh. 34 - Prob. 8TYCh. 34 - Which is true? A loss of taste buds would reduce a...Ch. 34 - Prob. 10TYCh. 34 - Prob. 1CCQCh. 34 - Prob. 2CCQCh. 34 - Prob. 3CCQCh. 34 - Prob. 1CBQCh. 34 - Prob. 2CBQ
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- Night vision begins with the stimulation ofarrow_forwardExplain why some children with retinoblastoma develop multiple tumors of the retina in both eyes, whereas others have a single tumor in only one eye.arrow_forwardNight vision begins with stimulation of_______ . a. hair cells c. cone cells b. rod cells d. neurogliaarrow_forward
- Described the______________ is the colored section in the eye around the pupil.arrow_forwardName the eye defect occuring in old people whereby they are unable to see near objects.arrow_forwardConsumption of which food can prevent the kind of blindness associated with vitamin A deficiency?arrow_forward
- Fill in the blank: Meissner’s corpuscles are responsible for the sense of light _______________________.arrow_forwardThe salivary glands produce saliva. Explain why a tumor in the salivary glands that destroys the saliva-producing cells can interfere with taste sensation.arrow_forwardWhich statement is accurate about the cochlear duct? a. It detects linear acceleration of the head when the otolithic membrane bends the hair cells. b. It is filled with perilymph. c. It contains hair cells that convert sound waves into nerve signals. d. It contains a spiral organ that rests on a vestibular membrane.arrow_forward
- Occupational Hearing Loss Frequent exposure to loud noise of a particular pitch can cause loss of hair cells in the part of the cochlea that responds to that pitch. People who work with or around noisy machinery are at risk for such frequency-specific hearing loss. Taking precautions such as using ear plugs to reduce sound exposure is important. Noise-induced hearing loss can be prevented, but once it occurs it is irreversible because dead or damaged hair cells are not replaced. FIGURE 33.24 shows the threshold decibel levels at which sounds of different frequencies can be detected by an average 25-year-old carpenter, a 50-year-old carpenter, and a 50-year-old who has not been exposed to on-the-job noise. Sound frequencies are given in hertz (cycles per second), The more cycles per second, the higher the pitch. FIGURE 33.24 Effects of age aria occupational noise exposure. The graph shows the threshold hearing capacities fin decibels) for sounds of different frequencies (given in hertz) in a 25-year-okj carpenter (blue). a 50-year-old carpenter (red), arid a 50-year-ofd who did not have any on-the-job noise exposure (brown). 1. Which sound frequency was most easily detected by all three people?arrow_forwardOccupational Hearing Loss Frequent exposure to loud noise of a particular pitch can cause loss of hair cells in the part of the cochlea that responds to that pitch. People who work with or around noisy machinery are at risk for such frequency-specific hearing loss. Taking precautions such as using ear plugs to reduce sound exposure is important. Noise-induced hearing loss can be prevented, but once it occurs it is irreversible because dead or damaged hair cells are not replaced. FIGURE 33.24 shows the threshold decibel levels at which sounds of different frequencies can be detected by an average 25-year-old carpenter, a 50-year-old carpenter, and a 50-year-old who has not been exposed to on-the-job noise. Sound frequencies are given in hertz (cycles per second). The more cycles per second, the higher the pitch. FIGURE 33.24 Effects of age aria occupational noise exposure. The graph shows the threshold hearing capacities fin decibels) for sounds of different frequencies (given in hertz) in a 25-year-okj carpenter (blue), a 50-year-old carpenter (red), and a 50-year-otd who did not have any on-the-job noise exposure (brown). 3. Which of the three people had the best hearing in the range of 4,000 to 6,000 hertz? Which had the worst?arrow_forwardOccupational Hearing Loss Frequent exposure to loud noise of a particular pitch can cause loss of hair cells in the part of the cochlea that responds to that pitch. People who work with or around noisy machinery are at risk for such frequency-specific hearing loss. Taking precautions such as using ear plugs to reduce sound exposure is important. Noise-induced hearing loss can be prevented, but once it occurs it is irreversible because dead or damaged hair cells are not replaced. FIGURE 33.24 shows the threshold decibel levels at which sounds of different frequencies can be detected by an average 25-year-old carpenter, a 50-year-old carpenter, and a 50-year-old who has not been exposed to on-the-job noise. Sound frequencies are given in hertz (cycles per second). The more cycles per second, the higher the pitch. FIGURE 33.24 Effects of age aria occupational noise exposure. The graph shows the threshold hearing capacities fin decibels) for sounds of different frequencies (given in hertz) in a 25-year-okj carpenter (blue), a 50-year-old carpenter (red), and a 50-year-otd who did not have any on-the-job noise exposure (brown). 2. How loud did a 1,000-hertz sound have to be for the 50-year-old carpenter to detect it?arrow_forward
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