Essentials of Human Anatomy and Physiology (Custom)
15th Edition
ISBN: 9781269752862
Author: Marieb
Publisher: PEARSON
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Textbook Question
Chapter 8, Problem 7MC
Convergence
a. requires contraction of the medial rectus muscles of both eyes.
b. is needed for near vision.
c. involves transmission of impulses along the abducens nerves.
d. can promote eyestrain.
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Which of the following statements are true of the physiology of vision? (Read carefully and select all the correct statements.)
A.
Cones are the receptors for color.
B.
The lens adjusts for distant vision, and the cornea adjusts for near vision.
C.
The optic nerve is formed by the ganglion neurons of the choroid layer.
D.
For near vision, the pupils dilate and the eyes converge.
E.
The optic chiasma is a crossing of optic nerve fibers that contributes to binocular vision.
F.
The visual areas are in the occipital lobes of the cerebrum.
G.
The area of the retina for the best color vision is the optic disc.
H.
Rods are most numerous at the periphery of the retina.
Identify the visual accommodation when focusing on a near object.
A. Ciliary muscles contract, suspensory ligaments relax to make lens thick.
B. Ciliary muscles relax and pull on the suspensory ligaments to make lens thin.
C. Ciliary muscles relax and pull on the suspensory ligaments to make lens thick.
D. Ciliary muscles contract, suspensory ligaments relax to make lens thin.
. Recognize the sound transmission towards the inner ear.
A. Auditory meatus → cochlea → ossicles → oval window → tympanic membrane
B. Auditory meatus → tympanic membrane → ossicles → cochlea →oval window
C. Auditory meatus → ossicles → tympanic membrane → oval window →cochlea
D. Auditory meatus → tympanic membrane → ossicles → oval window →cochlea
Because fibers of the optic nerve that originate in the nasal halves of each retina cross over at the optic chiasma, each lateral geniculate receives input from a.both the right and left sides of the visual field of both eyes. b.the ipsilateral visual field of both eyes. c.the contralateral visual field of both eyes. d.the ipsilateral field of one eye and the contralateral field of the other eye.
Chapter 8 Solutions
Essentials of Human Anatomy and Physiology (Custom)
Ch. 8 - More than one choice may apply. Which of the...Ch. 8 - More than one choice may apply. Identify the...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 - Prob. 8MCCh. 8 - Prob. 9MCCh. 8 - Prob. 10MC
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 - Prob. 19SAECh. 8 - Describe the difference between the photopupillary...Ch. 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 - Prob. 36CAQCh. 8 - Prob. 37CAQCh. 8 - Prob. 38CAQCh. 8 - Brandon suffered a ruptured artery in his middle...Ch. 8 - Prob. 40CAQCh. 8 - Kathy visits her Optician as she has been...Ch. 8 - 42. Julie and her father love to find the...Ch. 8 - Prob. 43CAQCh. 8 - 44. Mrs. Garson has an immune disorder that causes...Ch. 8 - Prob. 45CAQ
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- a.) Which of the following components of the eye is responsible for two-thirds of the focusing? a. The lens b. The aqueous humour c. The retina d. The cornea e. The fovea b.) Which of the following components of the eye allows a person to focus on objects at various distances? a. The vitreous humour b. The optic nerve c. The lens d. The photoreceptor cells. e. The sclera c.) Which of the following components of the eye is responsible for image resolution? a. The pupil b. The retina c. The sclera d. The lens e. The corneaarrow_forwardwhich statements are true about the Auditory Structures and Functions a. The external ear consists of the auricle and external acoustic meatus. b. The middle ear connects the external and inner ears. The tympanic membrane is stretched across the external acoustic meatus. c. The malleus, incus, and stapes connect the tympanic membrane to the oval window of the outer ear. d. The auditory tube connects the middle ear to the pharynx and functions to equalize pressure.arrow_forwardWhen reading, a person with astigmatism sees some lines in sharp focus while others appear blurred. Astigmatism is caused by the a. inability of the iris to contract or dilate b. lens becoming cloudy and rigid c. number of cones on some parts of the retina being deficient d. curvature of the cornea or lens not being symmetricalarrow_forward
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