Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Chapter 18, Problem 6RFT
Summary Introduction
Introduction:
The eye’s wall consists of three layers, namely the inner layer, the intermediate layer, and the outer fibrous layer. The eyeball is a hollow structure and the orbital fat provides insulation and padding to the eye.
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The change in focal length of an eye lens is caused by the action of the:(a) Pupil(b) Retina(c) Cilliary muscles(d) Iris
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Chapter 18 Solutions
Human Anatomy (9th Edition)
Ch. 18 - Using the diagram, fill in the blanks below with...Ch. 18 - 2. A receptor that is especially common in the...Ch. 18 - Fine touch and pressure receptors provide detailed...Ch. 18 - Receptors in the saccule and utricle provide...Ch. 18 - 5. Deep to the subcutaneous layer, the eyelids are...Ch. 18 - Prob. 6RFTCh. 18 - Prob. 7RFTCh. 18 - Mechanoreceptors that detect pressure changes in...Ch. 18 - Prob. 9RFTCh. 18 - Auditory information about the frequency and...
Ch. 18 - Fill in the blanks below with the proper...Ch. 18 - Prob. 1RCCh. 18 - Prob. 2RCCh. 18 - 3. A person salivates when anticipating eating a...Ch. 18 - Prob. 4RCCh. 18 - 5. What could stimulate the release of an...Ch. 18 - Prob. 6RCCh. 18 - Prob. 7RCCh. 18 - Prob. 8RCCh. 18 - Prob. 9RCCh. 18 - Prob. 10RCCh. 18 - 1. Beth has surgery to remove some polyps...Ch. 18 - 2. Jared is 10 months old, and his pediatrician...Ch. 18 - Prob. 3CT
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- At sunset your visual system adapts to (a) fovea centralis vision. (b) rod-based vision. (c) macular vision. (d) cone-based vision.arrow_forwardThe 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.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_forward
- Which of the following statements are true regarding the fovea centralis of the eye? A) 100% cones B) 100% rods C) 50% rods and 50% cones D) 0% rods or cones - blind spot E)located in the central portion of the lensarrow_forwardThe order in which the cells in the eye process light is __________. A) photoreceptors; ganglion cells; bipolar cells B) ganglion cells; bipolar cells; photoreceptors C) photoreceptors; bipolar cells; ganglion cells D) bipolar cells; photoreceptors; ganglion cellsarrow_forwardRegarding 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_forward
- Conduction of sound from the middle ear to the internal ear occurs via vibration of the (a) malleus against the tympanic membrane, (b) stapes in the oval window, (c) incus in the round window, (d) tympanic membrane against the stapes.arrow_forwardDescribe the structures of the human eye that light passes before reaching the retina. What are the functions of each of these structures?arrow_forwardThe region of the vertebrate eye, where the optic nerve passes out of the retina, is called the(a) fovea(b) iris(c) blind spot(d) optic chaismaarrow_forward
- Given that frogs are nearsighted in air, which statement is most likely to be true about their vision in water? (a) They are even more nearsighted; because water has a higher index of refraction than air, a frog’s ability to focus light increases in water. (b) They are less nearsighted, because the cornea is less effective at refracting light in water than in air. (c) Their vision is no different, because only structures that are internal to the eye can affect the eye’s ability to focus. (d) The images projected on the retina are no longer inverted, because the eye in water functions as a diverging lens rather than a converging lens.arrow_forwardMing, a student in optometry school, felt very sad when she saw some premature babies at the hospital who were born before 25 weeks after conception. She knew that many of these children would soon be blind for life. Explain why.arrow_forwardGeorge was under a lot of stress. His final semester examination was only 2 days away, and he was not prepared at all. To make matters worse, his right eyelid suddenly started twitching, and he couldn’t concentrate. Should George be worried about his eye? What is the reason behind this twitching?arrow_forward
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