Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 10.5, Problem 21CC
Summary Introduction
To determine: The type of ion and its movement direction to facilitate depolarization when the ion channels in the stereocilia open up.
Introduction: Stereocilia are the organelles, present in the inner ear that respond to the mechanical stimuli, for example, fluid motion, hearing, and balance. They share the common features with intestinal microvilli and are 10-50 micrometers in length.
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Read the following statements
(a) The resting nerve membrane is freely permeable to
Na*, K* ions and negatively charged proteins.
(b) The activity of Na* - K* pump is responsible for
maintaining resting membrane potential.
(c) The resting membrane is impermeable to negatively
charged proteins present in the axoplasm.
Choose the option representing correct statements.
b only
a and b
b and c
a, b and c
Photoreceptor cells in the retina of the eye convert visible light into signals. They
have special ion channels that are open to Na+ only in the dark. Visible light
activation results in a change in membrane potential, as photons lead to closure of
Na+ channels.
Which of the following can you conclude? Select all that apply.
Photoreceptor membrane potential does not change in response to light
The photoreceptor cell is depolarized in the dark
The photoreceptor cells is depolarized with light
Photoreceptor cells hyperpolarize to light
Applying a pressure stimulus to the fluid-filled capsule of an isolated Pacinian corpuscle causes a brief burst of action potentials in the afferent neuron, which ceases until the pressure is removed, at which time another brief burst of action potentials occurs. If an experimenter removes the capsule and applies pressure directly to the afferent neuron ending, action potentials are continuously fired during the stimulus. Explain these results in the context ofadaptation.
Chapter 10 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 10.1 - What advantage do myelinated axons provide?Ch. 10.1 - What accessory role does the outer ear (the pinna)...Ch. 10.1 - Prob. 3CCCh. 10.1 - In Figure 10.5, what kind(s) of ion channel might...Ch. 10.1 - How do sensory receptors communicate the intensity...Ch. 10.1 - Prob. 6CCCh. 10.2 - Prob. 7CCCh. 10.2 - Prob. 8CCCh. 10.2 - Your sense of smell uses phasic receptors. What...Ch. 10.3 - Create a map or diagram of the olfactory pathway...
Ch. 10.3 - Create a map or diagram that starts with a...Ch. 10.3 - Prob. 12CCCh. 10.3 - Are olfactory neurons pseudounipolar, bipolar, or...Ch. 10.3 - Prob. 14CCCh. 10.3 - Prob. 15CCCh. 10.4 - Prob. 16CCCh. 10.4 - Prob. 17CCCh. 10.5 - Prob. 18CCCh. 10.5 - Would a cochlear implant help a person who suffers...Ch. 10.5 - Prob. 20CCCh. 10.5 - Prob. 21CCCh. 10.5 - Prob. 22CCCh. 10.5 - Prob. 23CCCh. 10.6 - What functions do the aqueous humor serve?Ch. 10.6 - Prob. 25CCCh. 10.6 - Prob. 26CCCh. 10.6 - Prob. 27CCCh. 10.6 - Prob. 28CCCh. 10.6 - Prob. 29CCCh. 10.6 - Some vertebrate animals that see well in very low...Ch. 10.6 - Prob. 31CCCh. 10.6 - Macular degeneration is the leading cause of...Ch. 10.6 - Prob. 33CCCh. 10.6 - Draw a map or diagram to explain...Ch. 10 - What is the role of the afferent division of the...Ch. 10 - Prob. 2RQCh. 10 - Prob. 3RQCh. 10 - Prob. 4RQCh. 10 - Prob. 5RQCh. 10 - Prob. 6RQCh. 10 - Prob. 7RQCh. 10 - When a sensory receptor membrane depolarizes (or...Ch. 10 - Prob. 9RQCh. 10 - The organization of sensory regions in the _____...Ch. 10 - Prob. 11RQCh. 10 - Prob. 12RQCh. 10 - Prob. 13RQCh. 10 - Prob. 14RQCh. 10 - Prob. 15RQCh. 10 - Which structure of the inner ear codes sound for...Ch. 10 - Prob. 17RQCh. 10 - Prob. 18RQCh. 10 - Prob. 19RQCh. 10 - Prob. 20RQCh. 10 - Prob. 21RQCh. 10 - Prob. 22RQCh. 10 - Prob. 23RQCh. 10 - Prob. 24RQCh. 10 - Prob. 25RQCh. 10 - Trace the neural pathways involved in olfaction....Ch. 10 - Prob. 27RQCh. 10 - Prob. 28RQCh. 10 - Prob. 29RQCh. 10 - Map the following terms related to vision. Add...Ch. 10 - Prob. 31RQCh. 10 - Prob. 32RQCh. 10 - Prob. 33RQCh. 10 - Prob. 34RQCh. 10 - Prob. 35RQCh. 10 - Consuming alcohol depresses the nervous system and...Ch. 10 - Prob. 37RQCh. 10 - A clinician shines a light into a patients left...Ch. 10 - An optometrist wishes to examine a patients...Ch. 10 - The iris of the eye has two sets of antagonistic...Ch. 10 - As people age, their ability to see at night...Ch. 10 - The relationship between focal length (F) of a...
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- Indicate where all the structures are locatedarrow_forwardThe graphs represent a membrane potential recording from a hair cell (graph A) and a neuron it synapses with (graph B) in response to a small stimulus at the time indicated by an arrow. Explain how each graph would change in response to a stimulus of much greater intensity and whyarrow_forwardWhat happens to Na+ when a neuron is stimulated on its dendrite? Why does the movement of Na+ raise the voltage on the plasma membrane?arrow_forward
- The apical surfaces of hair cells are exposed to an unusual extracellular fluid called endolymph. Endolymph is relatively similar in ionic composition to cytoplasm: Select one: O O a. it is high in Na+ (-150 mM), low in K+ b. It is high in K+ (250 mM), low in Na+ c. it is high in K+ (150 mM), low in Na+ d. It is high in Ca 2+ (-250 mM), low in Na+ (-2 mM), and relatively low in Ca 2+ (100 μM). (-4 mM), and relatively low in Ca 2+ (150 µm). (2 mM), and relatively low in Ca 2+ (100 µm). (2 mM), and relatively low in K+ (150 M).arrow_forwardWhat characteristic of the basilar membrane is important for the function of the mechanically regulated gated K+ channelsof the hair cells? How do you think this characteristic changes as a person ages?arrow_forwardAssume a neuron is at rest and the following changes happen: Step 1: Neurotransmitter binds to an ionotropic excitatory neurotransmitter receptor causing an EPSP. Step 2: With the neurotransmitter still bound either a NAM or non-competitive antagonist bind to the allosteric site of the receptor. Answer the following questions that explains how the NAM and non-competitive antagonist would differ in their actions. 4.) A. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the NAM. B. Going from step 1 to step 2 what would happen to the ionotropic receptor (ion channel) as a result of the non-competitive antagonist. C. Going from step 1 to step 2 how would membrane potential change as a result of the NAM D. Going from step 1 to step 2 how would the membrane potential change as a result of the non-competitive antagonist.arrow_forward
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