Essentials of Human Anatomy & Physiology (12th Edition)
12th Edition
ISBN: 9780134395326
Author: Elaine N. Marieb, Suzanne M. Keller
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 19SAE
Trace the pathway of light from the time it hits the cornea until it excites the rods and cones.
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___________ responds to faint light, while ________ respond to color.
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In a detailed essay, 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...).
Please provide step-by-step details! please be sure you add all required info.
Identify the afferent/sensory nerve involved in the light reflex and the efferent/motor nerve involved in the light reflex.
Chapter 8 Solutions
Essentials of Human Anatomy & Physiology (12th Edition)
Ch. 8 - Prob. 1MCCh. 8 - Alkaloids excite gustatory hairs mostly at the a....Ch. 8 - Prob. 3MCCh. 8 - Which cranial nerve controls contraction of the...Ch. 8 - The cornea is nourished by a. corneal blood...Ch. 8 - When the eye focuses for far vision, a. the lens...Ch. 8 - Convergence a. requires contraction of the medial...Ch. 8 - 8. Which of the following are paired...Ch. 8 - Movement of the ______ membrane triggers bending...Ch. 8 - 10. Sounds entering the external acoustic meatus...
Ch. 8 - Prob. 11SAECh. 8 - Prob. 12SAECh. 8 - 13. Diagram and label the internal structures of...Ch. 8 - Prob. 14SAECh. 8 - Prob. 15SAECh. 8 - 16. What is the blind spot, and why is it so...Ch. 8 - What name is given to the structure that controls...Ch. 8 - What is the fovea centralis, and why is it...Ch. 8 - 19. Trace the pathway of light from the time it...Ch. 8 - Prob. 20SAECh. 8 - 21. Define hyperopia, myopia, and emmetropia.
Ch. 8 - Prob. 22SAECh. 8 - Prob. 23SAECh. 8 - Prob. 24SAECh. 8 - Many students struggling through mountains of...Ch. 8 - Prob. 26SAECh. 8 - Prob. 27SAECh. 8 - Prob. 28SAECh. 8 - Prob. 29SAECh. 8 - Prob. 30SAECh. 8 - Prob. 31SAECh. 8 - Prob. 32SAECh. 8 - Prob. 33SAECh. 8 - Which special sense requires the most learning?Ch. 8 - 35. For each of the following descriptions,...Ch. 8 - An engineering student has been working in...Ch. 8 - Prob. 37CTCh. 8 - Prob. 38CTCh. 8 - Brandon suffered a ruptured artery in his middle...Ch. 8 - Prob. 40CTCh. 8 - Prob. 41CTCh. 8 - 42. Julie and her father love to find the...Ch. 8 - Prob. 43CTCh. 8 - 44. Mrs. Garson has an immune disorder that causes...Ch. 8 - Prob. 45CTCh. 8 - Explain the role of vitamin A in vision.
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- For vertebrate photoreception, define: (a) photopigment; (b) photoreceptor; and (c) receptive field.arrow_forwardIf you had been born without cone cells in your eyes, would you still be able to see? Explain.arrow_forwardTrace the path of a photon of light through all the layers of theretina discussed in this chapter. Then trace the nerve impulse from aphotoreceptor located on the right side of the left eyeball throughthe visual cortexarrow_forward
- Compare the anatomic structure of the cornea and the lens. Explain how oxygen and nutrients are supplied to these two structures.arrow_forwardSelect the incorrect match: 1.Muscle fibres of iris - Regulate diameter of pupil 2.Cells of retina first involved in visual input - Ganglionic cells 3.Space between lens and retina — Filled with vitreous humor 4.Fovea within macula lutea — Absence of rodsarrow_forwardEven though they are located in the back of the retinal tissue, what is the importance of the rod and cone photoreceptor cells to our sense of sight? (explain elaborately)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 processes are taking place (i.e rods, bipolar cells or ganglion cells, outer segment, inner segment…). It is a very important question If possible, provide all the correct and detailed information, please.arrow_forwardDescribe the photochemical reaction in the rods and explain how dark adaptation occurs.arrow_forwardwhich cells direct colored light? Are these cells in the choroid,sclera, or retina layer of the eye?arrow_forward
- Retinal ganglion cells fire at a variety of rates depending on characteristics of the visual stimulus. Select one: True Falsearrow_forwardThe correct pathway of activation (by sending neuronal signals) in the retina is bipolar cell - retinal ganglion cell - photoreceptor photoreceptor - retinal ganglion cell - bipolar cell retinal ganglion cell - bipolar cell - photoreceptor photoreceptor - bipolar cell - retinal ganglion cell O bipolar cell - photoreceptor - amacrine cellarrow_forwardName the photosensitive pigment present in the cone cells of the retina.arrow_forward
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