ESSENTIALS OF HUMAN ANAT+W/MOD. MAST A+
12th Edition
ISBN: 9781323849965
Author: Marieb
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 25SAE
Many students struggling through mountains of reading assignments are told that they need glasses for eyestrain. Why is it more of a strain on the extrinsic and intrinsic muscles to look at close objects than at far objects?
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Chapter 8 Solutions
ESSENTIALS OF HUMAN ANAT+W/MOD. MAST A+
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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- Larry goes to the doctor complaining that he cant see the right side of the visual field with either eye. Where in the visual signal-processing pathway is Larrys problem occurring?arrow_forwardWhat is the function of the tensor tympani muscle?arrow_forwardWhy is the eye "strained" more upon viewing nearby objects then far objects?arrow_forward
- Describe the muscles that control eye movementarrow_forwardWhat muscles contract in response to the activation of right PPRF? In what direction do the eyes move in response to the activation of right PPRF? Explain the neuronal circuitry by which the right PPRF controls horizontal gaze of eyes to the right.arrow_forwardWhat is meant by accomodation of eye? Name the muscles of the eye responsible for the same.arrow_forward
- As a person ages, their ability to focus on near objects(accommodation) changes. If a person is already myopic(near-sighted), why would corrective lenses not benecessary to read a book or computer screen?arrow_forwardWhat happens if the ciliary muscle in the eye is contracted?arrow_forwardWhat happens to the ciliary muscles when eye focuses on the near object.arrow_forward
- Why do some fibers project from the optic chiasm to the midbrain?arrow_forwardAssuming that someone is looking forwards while sitting in an office chair, which structure is most activated when spun in a circle? 1. Crista ampullaris of the posterior semicircular canal 2. Crista ampullaris of the lateral semicircular canal 3. Crista ampullaris of the anterior semicircular canal 4. Saccular maculaearrow_forwardHow would the otolith organs of an astronaut respond to zero gravity? Would the astronaut still have a subjective impression of motion? Would the semicircular canals detect angular acceleration equally well at zero gravity?arrow_forward
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