Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
11th Edition
ISBN: 9781305616660
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 14, Problem 8SQ
Rods differ from cones in the following ways:
- a. They detect dim light, not bright light.
- b. They have a different visual pigment.
- c. They are not located in the retina.
- d. All of the above.
- e. a and b only
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Which of the following statements aboutphotopic vision is false?a. It is mediated by the cones.b. It has a low threshold.c. It produces fine resolution.d. It does not function in starlight.e. It does not employ rhodopsin.
Which one of the following statements about photoreception is true?
a. Light detection is initiated by the absorbance of light (a photon) by a photopigment molecule.
b. Light detection is synonomous with vision.
c. Light detection is always initiated in a rod photoreceptor located in the retina.
d. Only light in the visible range (between 400 and 700 nm wavelength) can be detected by animals.
e. None of the above answer choices (neither A, nor B, nor C, nor D) is true.
Which of the following statements explains why vision is less sharp in dim light than in bright light?a. Cones are more responsive in dim light.b. There are more rods than cones in the eye.c. Many rods converge on a single ganglion.d. The dilated pupil lets in more light than the lens can focus.
Chapter 14 Solutions
Bundle: Human Biology, Loose-leaf Version, 11th + MindTap Biology, 1 term (6 months) Printed Access Card
Ch. 14 - When a receptor cell detects a specific kind of...Ch. 14 - Name six categories of sensory receptors and the...Ch. 14 - How do somatic sensations differ from special...Ch. 14 - Explain where free nerve endings are located in...Ch. 14 - Prob. 5RQCh. 14 - What are the stimuli for taste receptors?Ch. 14 - How do smell signals arise and reach the brain?Ch. 14 - Label the parts of the ear:Ch. 14 - In the ear, sound waves cause the tympanic...Ch. 14 - Label the parts of the eye:
Ch. 14 - How does the eye focus the light rays of an image?...Ch. 14 - A __________is a specific form of energy that can...Ch. 14 - Awareness of a stimulus is called a ________.Ch. 14 - ____________ is understanding what particular...Ch. 14 - A sensory system is composed of __________. a....Ch. 14 - ___________detect energy associated with changes...Ch. 14 - Detecting substances present in the body fluids...Ch. 14 - Which of the special senses is based on the...Ch. 14 - Rods differ from cones in the following ways: a....Ch. 14 - The outer layer of the eye includes...Ch. 14 - The inner layer of the eye includes the...Ch. 14 - Your visual field is ______________. a. a...Ch. 14 - Match each of the following terms with the...Ch. 14 - Prob. 1CTCh. 14 - Prob. 2CTCh. 14 - Jill is diagnosed with sensorineural deafness, a...Ch. 14 - Larry goes to the doctor complaining that he cant...Ch. 14 - In a rock climber like the man pictured in Figure...
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- 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_forwardWhich of the following statements is correct A. The innermost layer of the retina contains mainly photoreceptors B. The axons that form the optic nerve emerge only from ganglion cells. C. Several types of ganglion cells spike whereas the others do not. D. Two of the statements are correct. E. All three statements are correct.arrow_forwardColour blindness can result from the loss of specific types of cones, or it can occur in individuals having fewer cones of a given type. An individual has 50% less than the normal number of green cone photoreceptors in his or her retina. How would this affect his or her vision? a. This person has night blindness. He or she should start to eat more carrots to replenish the stock of retinal molecules in the retina. b. This person will have difficulty adapting to varying light levels. His or her cone receptors take much longer to adapt in a brightly lit area. c. This person does not have a colour blindness because no green cone photoreceptors are in the retina; only red, yellow, and blue photoreceptors exist. d. This person has a mild green colour blindness. He or she cannot see green colours very clearly and has difficulty distinguishing colours involving green hues.arrow_forward
- Which of the following is accurate about the maculae of the vestibular apparatus? a. They detect rotational movements of the head. b. They are located in the semicircular canal. c. Nerve signals are generated when the otolithic membrane bends the stereocilia of the hair cells. d. They are the organs of hearing.arrow_forwardOcclusion is a. the condition in which object properties don’t change when viewed from different angles. b. the idea that numerous physical stimuli can create the same image on the retina. c. when one object partially covers another. d. when the stimulus on the receptors is ambiguous.arrow_forwardWhich 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_forward
- Vision is a complex process. The human eye has many structures that contribute to vision. Which of the following statements describing the structures involved in the process of vision is NOT correct? a. Ciliary muscles change the shape of the lens to focus both near and distant objects. b. The cornea and lens bend light to focus the image on the retina. c. The iris relaxes and contracts to protect the retina from excess light. d. Lenses move forward or backward to control the amount of light striking the retina.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_forwardThe photoreceptors that perceive color and sharp vision area. amacrine cells.b. rods.c. horizontal cells.d. cones.arrow_forward
- Which 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_forwardWhen you exit a dark room into a brightly lit environment, within seconds, you to see a crisp view of your surroundings. However, when you enter a dark room from a brightly lit environment, your eyes might take more than 10 minutes to become used to the new surroundings. Your eyes are waiting for: a. the rods to begin to function b. the cones to begin to function c. the pupils to get smallerarrow_forwardWhich of the following is true about rods? a. Rods have a low level of photopigment. b. Rods are concentrated in the fovea. c. Rods adapt slowly to darkness. d. Rods can detect colorarrow_forward
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