EBK HUMAN PHYSIOLOGY
7th Edition
ISBN: 9780133983401
Author: Silverthorn
Publisher: YUZU
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Textbook Question
Chapter 8, Problem 10RQ
List the four major types of ion channels found in neurons. Are they chemically gated, mechanically gated, or voltage-gated?
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Check out a sample textbook solutionStudents have asked these similar questions
Match each type of membrane potential (resting, threshold, graded, or action) to its definition:
a) The membrane potential at which voltage gated sodium channels open.
b) The membrane potential that triggers the action potential.
c) Change in membrane potential that may or may not reach threshold and that may be depolarizing or hyperpolarizing.
d) Rapid, strong depolarization followed by immediate repolarization. This potential is self-renewing if the right ion channels are nearby.
Suppose that in a certain neuron, negatively charged protein molecules found in the
intracellular compartment were suddenly able to diffuse through the cell membrane
freely. What would be the result on this cell's resting membrane potential and action
potential threshold?
A) The resting potential would hyperpolarize and the action potential threshold
would not change.
B)
The resting potential would depolarize and the action potential threshold
would decrease.
C)
The resting potential would depolarize and the action potential threshold
would not change.
D)
The resting potential would hyperpolarize and the action potential threshold
would increase.
Differentiate between ligand - gated and voltage-gated channels.
Chapter 8 Solutions
EBK HUMAN PHYSIOLOGY
Ch. 8 - Organize the following terms describing functional...Ch. 8 - Where do neurohormone-secreting neurons terminate?Ch. 8 - What is the difference between a nerve and a...Ch. 8 - Draw a chain of three neurons that synapse on one...Ch. 8 - What is the primary function of each of the...Ch. 8 - Name the two glial cell types that form myelin....Ch. 8 - Given the values in Table 8.2, use the Nernst...Ch. 8 - Would a cell with a resting membrane potential of...Ch. 8 - Would the cell membrane depolarize or...Ch. 8 - Match each ions movement with the type of graded...
Ch. 8 - Prob. 11CCCh. 8 - What is the difference between conductance and...Ch. 8 - If you put ouabain, an inhibitor of the Na+-K+...Ch. 8 - The pyrethrin insecticides, derived from...Ch. 8 - When Na+ channel gates are resetting, is the...Ch. 8 - A stimulating electrode placed halfway down an...Ch. 8 - Place the following neurons in order of their...Ch. 8 - Prob. 18CCCh. 8 - Prob. 19CCCh. 8 - Prob. 20CCCh. 8 - Prob. 21CCCh. 8 - Prob. 22CCCh. 8 - Classify the H+-neurotransmitter exchange as...Ch. 8 - Prob. 24CCCh. 8 - Prob. 25CCCh. 8 - Is Na+-dependent neurotransmitter reuptake...Ch. 8 - In Figure 8.24e, assume the postsynaptic neuron...Ch. 8 - In the graphs of Figure 8.24a, b, why doesnt the...Ch. 8 - Prob. 29CCCh. 8 - Prob. 30CCCh. 8 - List the three functional classes of neurons, and...Ch. 8 - Somatic motor neurons control __________, and...Ch. 8 - Prob. 3RQCh. 8 - Prob. 4RQCh. 8 - Prob. 5RQCh. 8 - Prob. 6RQCh. 8 - Axonal transport refers to the (a) release of...Ch. 8 - Match the numbers of the appropriate...Ch. 8 - Arrange the following events in the proper...Ch. 8 - List the four major types of ion channels found in...Ch. 8 - Prob. 11RQCh. 8 - An action potential is (circle all correct...Ch. 8 - Choose from the following ions to fill in the...Ch. 8 - What is the myelin sheath?Ch. 8 - List two factors that enhance conduction speed.Ch. 8 - Prob. 16RQCh. 8 - Draw and label a graph of an action potential....Ch. 8 - Prob. 18RQCh. 8 - Prob. 19RQCh. 8 - Create a map showing the organization of the...Ch. 8 - Prob. 21RQCh. 8 - Prob. 22RQCh. 8 - Prob. 23RQCh. 8 - Prob. 24RQCh. 8 - The presence of myelin allows an axon to (choose...Ch. 8 - Define, compare, and contrast the following...Ch. 8 - Prob. 27RQCh. 8 - Prob. 28RQCh. 8 - Prob. 29RQCh. 8 - Prob. 30RQCh. 8 - An unmyelinated axon has a much greater...Ch. 8 - The GHK equation is sometimes abbreviated to...Ch. 8 - In each of the following scenarios, will an action...
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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
- Contrast chemically gated and voltage gated channels. How do their functions differ? In which segments of a neuron are found?arrow_forwardList three ways in which action potentials can be initiated in neurons?arrow_forwardWhat effect would decreasing the concentration of extracellular potassium ions have on the membrane potential of a neuron?arrow_forward
- Refer to the graph showing the course of an action potential. Which of the numbered points along the graph represent the time when voltage-gated potassium channels are first activated? a) 1 b) 2 c) 3 d) 4 e) 5arrow_forwardWould anyone be able to explain these different channels? I would like an explanation as to why voltage gated membranes are associated with axon membranes (although it's prob because of membrane potential differences and depolarization/hyperpolarization?), why ligand gated channels are primarily at synapses (via neurotransmitters?), etc.arrow_forwardWhat properties of ion channels allow them to generate the large, rapid changes in membrane potential?arrow_forward
- At which point in the graph do voltage-gated potassium channels open? (Base your answer to this question on the graph below depicting an action potential.) A B C D Earrow_forwardWhat kinds of changes in ion conductance may be expected in an action potential? And how do ion channels permit these changes?arrow_forwardName the three phases of an action potential. Describe for each the underlying molecular basis and the ion involved. Why is the term voltage-gated channel applied to Na+ channels involved in the generation of an action potential?arrow_forward
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