Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 45.4, Problem 3R
Summary Introduction
To review:
The difference in the spectral sensitivity of rods and cones.
Introduction:
A human eye has two very specialized cells that capture light and helps in image formation. These structures are namely rods and cones. Rods provide vision ability in night while cones are responsible for vision in light and capability of eye to distinguish among the different colors.
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Why do rods provide greater visual sensitivity while cones provide better acuity?
Distance between the eye and eye chart must be 6 meter during examination of visual acuity. Why?
Explain the differences between rods and cones
Chapter 45 Solutions
Life: The Science of Biology
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- Describe how the differences in the size of the receptive fields within the fovea and peripheral retinal eye fields explain how the Hermann grid illusion worksarrow_forwardTerm one defect of vision which cannot be corrected by any type of spectacle lenses?arrow_forwardProvide a step by step list of visual sensation through visual processing. Begin at light entering the eye through signal transduction, to the circuitry involved in the brain in understanding the "what" and "where" of the object. Be sure to review the specific criteria outlined in the rubric.arrow_forward
- Explain the process of phototransduction and signal transmission in the retina. Be sure to include the steps associated with the formation/breakdown of Rhodopsin as well as the signal transduction process that takes place in the retina beginning in the dark. Be sure to also include where in the retina these process are taking place (i.e rods, bipolar cells or ganglion cells, outer segment, inner segment…).arrow_forwardUsing a line diagram, show how parallel rays of light are brought to a focus on the retina. Explain how this focus is maintained as the distance from the object to the eye is increasedor decreased (that is, explain accommodation).arrow_forwardPlease explain the concepts of amplitude and wavelength, visual spectrum, cornea, pupil, cones, and rods. Why does the blind spot exist? What is meant by binocular cues and binocular disparity?arrow_forward
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