Human Anatomy & Physiology (2nd Edition)
2nd Edition
ISBN: 9780134553511
Author: Erin C. Amerman
Publisher: PEARSON
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Textbook Question
Chapter 15.5, Problem 9QC
How do rods hyperpolarize when light strikes them? How does this affect the firing rate of a ganglion cell?
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What happens to rods if they are constantly exposed to light?
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Based on the attached figure (Figure 9.8 in the textbook), what is
the actual membrane mechanism mediating the light-induced
hyperpolarization of a photoreceptor?
(A) Dark
Rod outer segment
CGMP
0
CGMP
CGMP
CGMP
K+
Rod inner
segment
Inside
Obelecendra
EX
Ca²+
Na+
Outside
Na+ influx,
K+ efflux:
Depolarization
(B) Light
Rod outer segment
LIELITI
CGMP
reduced
Rod inner
segment
Ca2+
Na
Inside
Outside
Reduced Na+ influx,
K* efflux:
Hyperpolarization
Chapter 15 Solutions
Human Anatomy & Physiology (2nd Edition)
Ch. 15.1 - What are the three major differences between the...Ch. 15.1 - What is sensory transduction?Ch. 15.2 - 1. Where is the olfactory epithelium located?
Ch. 15.2 - 2. What types of cells make up the olfactory...Ch. 15.2 - Describe the structure of an olfactory neuron.Ch. 15.2 - What happens in an olfactory neuron when an...Ch. 15.2 - How can humans detect such a variety of odors with...Ch. 15.2 - Prob. 6QCCh. 15.3 - Where are taste buds located?Ch. 15.3 - Prob. 2QC
Ch. 15.3 - Prob. 3QCCh. 15.3 - Prob. 4QCCh. 15.3 - How does a gustatory cell transduce a chemical...Ch. 15.3 - 6. Which cranial nerves transmit taste sensation...Ch. 15.3 - 7. Which part of the brain is responsible for...Ch. 15.4 - What are the functions of the tarsal glands and...Ch. 15.4 - Trace the path of tears as they travel from the...Ch. 15.4 - 3. Which two extrinsic eye muscles move the eye...Ch. 15.4 - Prob. 4QCCh. 15.4 - 5. What are the functions of each component of...Ch. 15.4 - 6. What are the two fluids found in the eyeball?...Ch. 15.5 - Prob. 1QCCh. 15.5 - Prob. 2QCCh. 15.5 - What is accommodation?Ch. 15.5 - Prob. 4QCCh. 15.5 - 5. What is the near point of accommodation, and...Ch. 15.5 - 6. How do myopia and hyperopia differ?
Ch. 15.5 - How are rods different from cones?Ch. 15.5 - Why are photoreceptors depolarized in the dark?Ch. 15.5 - How do rods hyperpolarize when light strikes them?...Ch. 15.5 - 10. What happens at the optic chiasma? What is...Ch. 15.5 - 11. What type of visual processing occurs in the...Ch. 15.6 - 1. What is the auricle?
Ch. 15.6 - What is the purpose of cerumen?Ch. 15.6 - 3. Where is the tympanic membrane located?
Ch. 15.6 - Prob. 4QCCh. 15.6 - What is the role of the pharyngotympanic tube?Ch. 15.6 - What are the functions of the utricle, saccule,...Ch. 15.6 - How are the scala tympani, scala media, and scala...Ch. 15.6 - 8. What is the spiral organ, and where is it...Ch. 15.7 - 1. What physical properties determine the pitch...Ch. 15.7 - 2. What is the range (in hertz) of human...Ch. 15.7 - 3. Why is the force exerted on the oval window...Ch. 15.7 - Prob. 4QCCh. 15.7 - Prob. 5QCCh. 15.7 - Prob. 6QCCh. 15.7 - Prob. 7QCCh. 15.7 - Prob. 8QCCh. 15.8 - How do static and dynamic equilibrium differ?Ch. 15.8 - 2. What role do the utricle and saccule play in...Ch. 15.8 - What role do they play in dynamic equilibrium?Ch. 15.8 - Prob. 4QCCh. 15.8 - 5. What are the three primary areas of the...Ch. 15 - Match the cell type with the correct stimulus....Ch. 15 - 2. The axons of the olfactory nerve terminate in...Ch. 15 - 3. Fill in the blanks: In an olfactory neuron, the...Ch. 15 - The primary olfactory cortex is located in the: a....Ch. 15 - 5. Which of the following statements is true...Ch. 15 - Match the taste with the chemical substance that...Ch. 15 - Prob. 7CYRCh. 15 - Prob. 8CYRCh. 15 - 9. Which cells in the retina are depolarized in...Ch. 15 - Prob. 10CYRCh. 15 - Each of the following statements is false. Correct...Ch. 15 - The axons from the nasal retina in the left eye...Ch. 15 - Mark the following statements as true or false. If...Ch. 15 - Explain how sounds of different frequencies are...Ch. 15 - Prob. 15CYRCh. 15 - Prob. 16CYRCh. 15 - Prob. 17CYRCh. 15 - 18. True or false: Hair cells in the spiral organ...Ch. 15 - 19. Which of the following is not part of the...Ch. 15 - 20. Fill in the blanks: In the ampulla of a...Ch. 15 - Stimuli from the inner ear regarding head movement...Ch. 15 - 1. Explain what would happen to your sense of...Ch. 15 - In which direction would you be unable to move...Ch. 15 - If a patient suffers visual impairment only in one...Ch. 15 - 4. Following a stroke, a patient lost vision in...Ch. 15 - Why do you have the sensation that you are still...Ch. 15 - 1. Mr. Spencer suffers loss of taste sensation....Ch. 15 - 2. Your friend tells you that she has just been...Ch. 15 - Prob. 3AYKACh. 15 - Prob. 4AYKACh. 15 - Mrs. Flores is a 45-year-old female who suffered a...Ch. 15 - 6. Your 60-year-old patient, Mr. Guster, has...
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