Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 12, Problem 7TY
Summary Introduction
Introduction:
The eye is structured in a very particular way in order to optimize the capture and processing of visual stimuli, which take the form of light. It is like a camera, providing a path for the light to travel through and subsequently be focused at the right spot.
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Identify the following structures and sketch them in the spaces provided:
1. Cornea
2. Anterior cavity containing aqueous humor
3. Iris
4. Pupil
5. Lens
6. Zonular fibers of the lens
7. Ciliary body
a. Ciliary processes
b. Ciliary muscle
8. Vitreous chamber containing vitreous body
9. Sclera
10. Choroid
11. Retina
a. Macula lutea
i. Fovea centralis
b. Rods
c. Cones
12. Optic disc
13. Optic nerve (cranial nerve II)
14. Primary visual cortex of the brain
Which of the following correctly traces the path of light through the eye?a. aqueous humor—pupil—cornea—lens—vitreous humor—retinab. cornea—aqueous humor—pupil—lens—vitreous humor—retinac. cornea—vitreous humor—lens—pupil—aqueous humor—retinad. pupil—cornea—vitreous humor—lens—aqueous humor—retina
Myopia is a condition in which a person has
Select one:
a. light rays focusing in front of the retina due to a flattened cornea
b. light rays focusing in front of the retina due to a short eyeball
c. light rays focusing in front of the retina due to a cornea that is too curved
d. light rays focusing in front of the retina due to a detached retina
Chapter 12 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 12 - Prob. 1QCCh. 12 -
2. Should the use of all hand-held devices,...Ch. 12 - Do you approve of the law in five states that a...Ch. 12 -
1. List the five classifications of receptors in...Ch. 12 - Prob. 2CRCh. 12 -
3. Describe what information the somatic...Ch. 12 - Name the five special senses.Ch. 12 - Compare and contrast fast pain, slow pain, and...Ch. 12 - Prob. 6CRCh. 12 - Prob. 7CR
Ch. 12 - Prob. 8CRCh. 12 - Prob. 9CRCh. 12 - Prob. 10CRCh. 12 - What do the receptors in the skin for light touch...Ch. 12 - Prob. 2TYCh. 12 - Prob. 3TYCh. 12 - Receptor adaptation results when: a. sensory...Ch. 12 - Prob. 5TYCh. 12 - Different pitched sounds will result in...Ch. 12 - Prob. 7TYCh. 12 - Prob. 8TYCh. 12 - Prob. 9TYCh. 12 - Prob. 10TYCh. 12 - Prob. 11TYCh. 12 - Prob. 12TYCh. 12 - Prob. 13TYCh. 12 - Prob. 14TYCh. 12 - Which of the following can be corrected with...Ch. 12 - With the eyes closed, would an astronaut in outer...Ch. 12 - Why do you suppose that you are not normally aware...Ch. 12 - Prob. 3AWKCh. 12 - Prob. 4AWKCh. 12 - Prob. 5AWKCh. 12 - Prob. 6AWKCh. 12 - Prob. 7AWK
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- When reading, a person with astigmatism sees some lines in sharp focus while others appear blurred. Astigmatism is caused by the Select one: 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 O d. curvature of the cornea or lens not being symmetricalarrow_forwardWhich of the following statements are true of the parts of the eye? (Read carefully and select all the correct statements.) A. Vitreous humor is reabsorbed into the canal of Schlemm. B. The radial muscles of the iris constrict the pupil. C. The white of the eye is formed by the sclera. D. The choroid layer absorbs light within the eyeball. E. The conjunctiva is kept moist by tears secreted by the lacrimal glands. F. The retina is the innermost layer of the eyeball. G. The ciliary muscle is a circular smooth muscle that changes the shape of the cornea. H. Aqueous humor is the tissue fluid of the eye; it nourishes the lens and cornea.arrow_forwarda.) 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_forward
- State the part of eye that constricts or dilates based on the amount of light in the environment. A. Cornea B. Iris C. Pupil D. Sclera Choose the correct order for the light transmission inside the eyes. A. Cornea → retina – lens → retina B. Cornea - pupil → lens → retina C. Lens → pupil → cornea → retina D. Pupil → cornea → lens → retinaarrow_forwardIdentify 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 →cochleaarrow_forwardThe arrangement of tunics in the eye, from the innermost to outermost aspect of the eye, is a. retina, vascular, fibrous. b. vascular, retina, fibrous. c. vascular, fibrous, retina. d. retina, fibrous, vascular.arrow_forward
- Select 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_forwardwhat will happen if an eyeglasses has: a. two converging lens (explain) b. two diverging lens (explain) c. both converging and diverging lens (explain) P.S. This is not a multiple choice question thank Youarrow_forwardCiliary Body Conjunctiva Body of Iris Sclera Pupil Anterior chamber Anterior Suspensory ligaments cavity Posterior chamber Posterior cavity (vitreous chamber -A -C Retina E. A. F. B. G. C. D.arrow_forward
- Choose the structure that corresponds to each statement. a. bipolar cell layer e. macula lutea b. central fovea f. optic disc c. cones g. photoreceptor layer d. ganglion cell layer h. rods 1. has the highest density of cones in the retina 2. axons form optic nerve 3. does not contain photoreceptors; blind spot 4. photoreceptor that allows us to see color 5. contains rods and cones 6. the center of the neural portion of the retina 7. photoreceptor used in night vision 8. rods and cones synapse on these cellsarrow_forwardA clouding of the lens is called a. myopia. b. glaucoma. c. hyperopia. d. cataract.arrow_forward(iii) Aqueous humour is present between the: A. Lens and Retina B. Iris and Lens C. Cornea and Iris D. Cornea and Lensarrow_forward
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