Human Biology: Concepts and Current Issues - With Access (Custom)
15th Edition
ISBN: 9781323045237
Author: Johnson
Publisher: PEARSON
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Chapter 12, Problem 11TY
Summary Introduction
Introduction:
Photoreceptor cells are the cells that are found in the retina. There are three types of photoreceptors cells, which are rods, cones, and photosensitive retinal ganglion cells. Rod cells are the cells that are responsible for vision in low light levels, whereas the cones cells are responsible for vision in bright light.
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Which of the following provides an example of serial (rather than parallel) processing in the visual system?
a.
Visual information is sent from the retina, to the LGN, and then to the visual cortex.
b.
Rods and cones function simultaneously in the retina.
c.
The “what” and “where” streams in the visual association cortex work together.
d.
Processing of motion and shape inform each other.
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.
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.
Chapter 12 Solutions
Human Biology: Concepts and Current Issues - With Access (Custom)
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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- Which of the following statements about the contributions of rods and cones to vision is TRUE? A. The three types of cones (long, medium, short) are represented at roughly equal numbers B. Rods respond to light at ultra-violet wavelengths (>600nm) C. The relative density of cones is roughly even throughout the retina D. The greater sensitivity of rods in low light is explained by their larger number E. Several rods converge on a single bipolar cellarrow_forwardWhen 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 is/are correct about the visual system? A.Input from the left eye is processed exclusively in the right V1 cortex. B. Each point in the visual field is analyzed by both the right and left V1 cortices. C. The right visual hemifield projects to the right LGN. D. Two of the above statements are correct. E. None of the above statements are correct.arrow_forward
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- At each level of the retina-geniculate-striate system, receptive fields in the foveal area are ___ than those at the periphery Select one: a. both smaller and rounder, for the reasons mentioned in each respective option b. larger, since the fovea mediates low acuity vision c. smaller, since the fovea mediates high acuity vision d. rounder, the receptive fields in the periphery tend to be more square-shapedarrow_forwardWhich of the following is TRUE of the manner in which visual information is transferred from the eyes to the cortex? A. None of the choice options are TRUE B. All information from the retina of the left eye is transmitted to the ipsilateral hemisphere C. All information from the retina of the right eye is transmitted to the contralateral hemisphere D. All information from the left visual field is transmitted to the ipsilateral hemisphere E. All information from the right visual field is transmitted to the contralateral hemispherearrow_forwardput the following in the correct order of the most directly visual processing pathway from eyes to brain. a. lateral geniculate meuron b. ganglion cell. c. visual cortex neuron d. biploar cell e. optic nerve f. photorecpetorarrow_forward
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