The projections of the LGN to the visual cortex are easy to tract because: layers 1 and 2 are magnocellular pathways and layers 3,4,5 and 6 are parvocellular pathway layers 1 and 2 are parvocellular pathways and layers 3,4,5 and 6 are magnocellular pathway layers 2,3 and 5 are parvocellular and layers 1,4 and 6 are magnocellular doesn't matter because there is a mixture of pathways in each layers

The projections of the LGN to the visual cortex are easy to tract because: layers 1 and 2 are magnocellular pathways and layers 3,4,5 and 6 are parvocellular pathway layers 1 and 2 are parvocellular pathways and layers 3,4,5 and 6 are magnocellular pathway layers 2,3 and 5 are parvocellular and layers 1,4 and 6 are magnocellular doesn't matter because there is a mixture of pathways in each layers

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter41: Sensory Systems

Section: Chapter Questions

Problem 5TYK

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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), 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?
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), 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?
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), and a 50-year-otd who did not have any on-the-job noise exposure (brown). 4. Based on these data, would you conclude that the hearing decline in the 50-year-old carpenter was caused by age or by job-related noise exposure?
Why is it easier to see images at night using peripheral, rather than the central, vision? Cones are denser in the periphery of the retina Bipolar cells are denser in the periphery of the retina Rods are denser in the periphery of the retina The optic nerve exits at the periphery of the retina.
Explain why some children with retinoblastoma develop multiple tumors of the retina in both eyes, whereas others have a single tumor in only one eye.
Place the following into the correct order to represent the bleaching and regeneration of rhodopsin. Opsin and cis-retinal enzymatically combine to regenerate rhodopsin Trans-retinal is enzymatically converted back to cis-retinal Cis-retinal isomerizes to trans-retinal Trans-retinal separates from opsin Opsin triggers reaction cascade that breaks down cGMP Rhodopsin absorbs photon of light www Next >
A Physician Assistant student on clinical attachment in the Northern part of Ghana noted a high incidence of people reporting difficulty with night vision which has been due to lack of vitamin A in their diet. Explain why deficiency of vitamin A causes poor night vision or night blindness.
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?
Which of the following events does not occur during light absorption in the vertebrate eye? The retinal component of rhodopsin changes from cis to trans form. Rhodopsin, a G-proteincoupled receptor, triggers a signaltransduction pathway to close Na+ channels in the plasmamembrane. The light stimulus passes from rods and cones to bipolar cellsand horizontal cells and then to ganglion cells, whose axonscompose the optic nerve. As light absorption increases, the rhodopsin response causesan increase in the release of neurotransmitters. When integrating information across the retina, horizontalcells connect the rods and cones, and amacrine cells join with the bipolar cells and ganglion cells.
8-12 years old child's eye retina area is yellow. What is this disease? Macula Degeneration or Retinoblastoma? which biotechnological treatments could be the solution
Which of the following taste recognition is mediated by GPCRs? Bitter Umami Sweet Sour Salty
Which of the following statements comparing the LGN and the retina is correct? O Both are involved in the reconstruction (as opposed to point-by-point deconstruction) of visual stimul Both have ciells that respond to lines of a particular onentation in their receptive field. O Both get significant feedback connections (top-down infuence O Both have cells with concentric centersurraundreteptive fields O The retina has odenteand off-kenterteceptive eds, while the LGN nly tus Ton-center receptive fields