EBK ANATOMY & PHYSIOLOGY
5th Edition
ISBN: 9780321888013
Author: Hoehn
Publisher: VST
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 13, Problem 13RQ
The phenomenon of dark adaptation is best explained by the fact that
a. rhodopsin does not function in dim light,
b. rhodopsin breakdown occurs slowly,
c. rods exposed to intense light need time to generate rhodopsin,
d. cones are stimulated to function by bright light.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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 statement about the events of photoreception is false?
a) as a rod cell hyperpolarizes, its release of neurotransmitter increases
b) there is more Na+ entry into a rod cell in the dark than in the light
c) bipolar cells release more neurotransmitter in the light than in the dark
d) as a bipolar cell depolarizes, its release of neurotransmitter increases
e) when a rod cell releases neurotransmitter the bipolar cell it synapses with hyperpolarizes
Each of the following statements is false. Correct each statement to make it true. a. Activation of rhodopsin depolarizes photoreceptors. b. Activated rhodopsin activates transducin which deactivates cGMP phosphodiesterase. c. Cyclic GMP binds sodium channels, keeping them open, leading to the depolarization of photoreceptor in light.
Chapter 13 Solutions
EBK ANATOMY & PHYSIOLOGY
Ch. 13 - What are the three levels of sensory integration?Ch. 13 - Prob. 2CYUCh. 13 - Your cortex decodes incoming action potentials...Ch. 13 - Your PNS mostly consists of nerves. What else...Ch. 13 - Youve cut your finger on a broken beaker in your...Ch. 13 - What are tears and what structure secretes them?Ch. 13 - Prob. 7CYUCh. 13 - Prob. 8CYUCh. 13 - Arrange the following in the order that light...Ch. 13 - You have been reading this book text for a while...
Ch. 13 - Prob. 11CYUCh. 13 - For each of the following, indicate whether it...Ch. 13 - Prob. 13CYUCh. 13 - Which part of the visual field would be affected...Ch. 13 - Name the five taste modalities. Name the three...Ch. 13 - Prob. 16CYUCh. 13 - Apart from the bony boundaries, which structure...Ch. 13 - Which structure inside the spiral organ allows us...Ch. 13 - If the brain stem did not receive input from both...Ch. 13 - Prob. 20CYUCh. 13 - Prob. 21CYUCh. 13 - Prob. 22CYUCh. 13 - What is in a nerve besides axons?Ch. 13 - Prob. 24CYUCh. 13 - Name the cranial nerve(s) most involved in each of...Ch. 13 - Prob. 26CYUCh. 13 - After his horse-riding accident, the actor...Ch. 13 - What are varicosities and where would you find...Ch. 13 - Which parts of the nervous system ultimately plan...Ch. 13 - Prob. 30CYUCh. 13 - Prob. 31CYUCh. 13 - Prob. 32CYUCh. 13 - The large onion-shaped receptors that are found...Ch. 13 - Proprioceptors include all of the following except...Ch. 13 - Prob. 3RQCh. 13 - Prob. 4RQCh. 13 - Match the names of the cranial nerves in column B...Ch. 13 - For each of the following muscles or body regions,...Ch. 13 - Prob. 7RQCh. 13 - Prob. 8RQCh. 13 - The portion of the fibrous layer that is white and...Ch. 13 - Which sequence best describes a normal route for...Ch. 13 - Prob. 11RQCh. 13 - Damage to the medial recti muscles would probably...Ch. 13 - The phenomenon of dark adaptation is best...Ch. 13 - Blockage of the scleral venous sinus might result...Ch. 13 - Nearsightedness is more properly called a. myopia,...Ch. 13 - Of the neurons in the retina, the axons of which...Ch. 13 - Which sequence of reactions occurs when a person...Ch. 13 - The blind spot of the eye is a. where more rods...Ch. 13 - Olfactory tract damage would probably affect your...Ch. 13 - Sensory impulses transmitted over the facial,...Ch. 13 - Taste buds are found on the a. anterior part of...Ch. 13 - Gustatory epithelial cells are stimulated by a....Ch. 13 - Olfactory nerve filaments are found a. in the...Ch. 13 - Conduction of sound from the middle ear to the...Ch. 13 - Which of the following statements does not...Ch. 13 - Pitch is to frequency of sound as loudness is to...Ch. 13 - The structure that allows pressure in the middle...Ch. 13 - Which of the following is important in maintaining...Ch. 13 - Equilibrium receptors that report the position of...Ch. 13 - Which of the following is not a possible cause of...Ch. 13 - Prob. 31RQCh. 13 - Prob. 32RQCh. 13 - List the structural components of the peripheral...Ch. 13 - (a) Define plexus. (b) Indicate the spinal roots...Ch. 13 - What is the homeostatic value of flexor reflexes?Ch. 13 - Prob. 36RQCh. 13 - Explain how a crossed-extensor reflex exemplifies...Ch. 13 - What clinical information can be gained by...Ch. 13 - Prob. 39RQCh. 13 - Where are the olfactory sensory neurons, and why...Ch. 13 - How do rods and cones differ functionally?Ch. 13 - Where is the fovea centralis, and why is it...Ch. 13 - Prob. 43RQCh. 13 - Since there are only three types of cones, how can...Ch. 13 - Prob. 45RQCh. 13 - Central pattern generators (CPGs) are found at the...Ch. 13 - Prob. 47RQCh. 13 - Prob. 1CCSCh. 13 - Prob. 2CCSCh. 13 - Prob. 3CCSCh. 13 - Prob. 4CCSCh. 13 - Prob. 5CCS
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_forwardChoose 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 descriptions of photoreceptors in the eye is NOT correct? a. Cones are concentrated in the fovea of the retina and function to detect colours. b. Rods are concentrated at the periphery and function well in dim light. c. Rods are concentrated in the fovea of the retina and function well in dim light. d. Rods are sensitive to light and register black and white. Cones detect colours.arrow_forward
- 3. Soru Which of the following is a false statement about photoreceptors of the eye? A) Cones are active at high light levels and have high spatial acuity. B) Rods are responsible for scotopic vision while cones are responsible for photopic vision. C) Rods are active at low light level and have low spatial acuity. D) There are two types photoreceptors: rods and cones. E) The ratio of rods to cones in the retina is higher in humans than it is in dogs.arrow_forwardEskimos wear a great deal of clothing and have limited exposure to uv light, but do not suffer from Vitamin D deficiency. Why? A person who has been playing in the snow notices that their fingertips are very pale. why? Where would you expect to find a high concentration of Merkel discs and other tactile corpuscles? Why? An old wives' tale says that if you keep hair trimmed at the ends, it will grow faster. Please discuss why this is not true. Explain why you can scrap your skin but not bleed.arrow_forwardSelect the best answer or answers from the choices given: The phenomenon of dark adaptation is best explained by the fact that (a) rhodopsin does not function in dim light, (b) rhodopsin breakdown occurs slowly, (c) rods exposed to intense light need time to generate rhodopsin, (d) cones are stimulated to function by bright light.arrow_forward
- Which category of touch receptors would likely provide the least amount of useful information in very old/senior age? (hint: think about cortical plasticity) a. Pacinian Corpuscles b. Meissner Cells c. Merkel Cells d. Ruffini Endingsarrow_forwardWhich 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.arrow_forwardWhich 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.arrow_forward
- Select the options that properly describe the function and features of rods. A bright blue light would stimulate rods more than cones. In low light conditions rods perceive color as gray cale. sensitive to bright light conditions. Rods are sensitive to vision in low light conditions. In low light conditions rods perceive color as blue scale. Low light conditions are viewed in blue scale. O The absorbance of rhodopsin in the rods is much more sensitive than in the cone opsins. Rods are sensitive to vision in bright light conditions. sensitive to low light conditions. Rods are sensitive to low light conditions. V The absorbance of rhodopsin in the cones is much more sensitive than in the rods opsins. Rods are sensitive to bright light conditions.arrow_forwardWhich 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.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
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Animal Adaptations for Kids, Learn about physical, life cycle, and behavioral adaptations of animals; Author: Learn Bright;https://www.youtube.com/watch?v=m2MibjJgyjs;License: Standard youtube license