Campbell Biology: Concepts.. (Custom Package)
8th Edition
ISBN: 9781323042649
Author: Central Texas
Publisher: PEARSON
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Textbook Question
Chapter 29, Problem 5TYK
If you look away from this book and focus your eyes on a distant object, the eye muscles _____ and the lenses _____ to focus images on the retinas.
a. relax … flatten
b. relax … become more rounded
c. contract … flatten
d. contract … become more rounded
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Why is it difficult to watch your own eyes move when looking in the mirror? a. The eye movements are too fast to see. b. The eye movements are too small to see. c. During a saccadic eye movement, the eyes do not move relative to the background of the rest of the face. d. During saccadic eye movements, activity decreases in area MT.
The ciliary body/ muscle change the shape of the _____________.
a.sclera
b.optic disc
c.retina
d.cornea
e.lens
The focal length of the eye lens increases when eye muscles:(a) are relaxed and lens becomes thinner(b) contract and lens becomes thicker(c) are relaxed and lens becomes thicker(d) Contract and lens becomes thinner.
Chapter 29 Solutions
Campbell Biology: Concepts.. (Custom Package)
Ch. 29 - Prob. 1CCCh. 29 - Which of the following sensory receptors is...Ch. 29 - Which of the following are not known to be present...Ch. 29 - What do the receptor cells in the lateral line...Ch. 29 - If you look away from this book and focus your...Ch. 29 - Prob. 6TYKCh. 29 - Prob. 7TYKCh. 29 - Prob. 8TYKCh. 29 - Hold your right eye closed. With your left eye,...Ch. 29 - Prob. 10TYK
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- Paralysis of a medial rectus muscle would affect (a) accommodation,(b) refraction, (c) depth perception, (d) pupil constriction.arrow_forwardWhen the ciliary muscle is contracted, the following will: a) lens to become more spherical b) pupil to be dilated c) pupil to contract d) the lens to be flattenedarrow_forwardIf someone is born with dense cataracts on both eyes, and the cataracts are removed years later, what happens?A. The person remains permanently blind.B. The person gradually recovers all aspects of vision.C. The person gains some vision, but remains impaired on object recognition, motion vision, and depth perception.D. The person gains almost all aspects of vision, but remains greatly impaired on color perception.arrow_forward
- Regarding the eye's adaptation to darkness: a) then it happens faster than the eye's light adaptation b) so the pupils contract c) then the amount of rhodopsin increases d) No answer text provided.arrow_forwardA bar of light in a specific part of the retina, with a particular length and orientation, is the most effective stimulus for a.retinal ganglion cells. b.lateral geniculate cells. c.simple cortical cells. d.complex cortical cells.arrow_forwardYoshi has suffered minor damage to the bones in his left middle ear. What treatment, if any, might help restore his hearing? a. a hearing aid b. a cochlear implant c. Both a hearing aid and a cochlear implant will be needed. d. Such damage is permanent and cannot be remedied.arrow_forward
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