FUND. OF ANATOMY & PHYSIOLOGY F16 PKG
10th Edition
ISBN: 9781323431122
Author: Martini
Publisher: PEARSON C
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Textbook Question
Chapter 12, Problem 14CP
What effect would decreasing the concentration of extracellular potassium ions have on the membrane potential of a neuron?
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What effect would decreasing the concentration of extracellular potassium ions have on the membrane potential of a neuron?
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Chapter 12 Solutions
FUND. OF ANATOMY & PHYSIOLOGY F16 PKG
Ch. 12 - Prob. 1CPCh. 12 - Describe the two functional divisions of the...Ch. 12 - 3. Identify the two components of the efferent...Ch. 12 - Prob. 4CPCh. 12 - Name the structural components of a typical...Ch. 12 - Classify neurons according to their structure.Ch. 12 - Classify neurons according to their function.Ch. 12 - Prob. 8CPCh. 12 - Prob. 9CPCh. 12 - Prob. 10CP
Ch. 12 - Prob. 11CPCh. 12 - Prob. 12CPCh. 12 - Prob. 13CPCh. 12 - What effect would decreasing the concentration of...Ch. 12 - Define action potential.Ch. 12 - Identify the steps involved in the generation and...Ch. 12 - Prob. 17CPCh. 12 - Which of the following axons is myelinated: one...Ch. 12 - Prob. 19CPCh. 12 - Prob. 20CPCh. 12 - What effect would blocking voltage-gated calcium...Ch. 12 - Prob. 22CPCh. 12 - Prob. 23CPCh. 12 - Prob. 24CPCh. 12 - Prob. 25CPCh. 12 - Prob. 26CPCh. 12 - Prob. 27CPCh. 12 - LEVEL 1 Reviewing Facts and Terms 1. Label the...Ch. 12 - Prob. 2RQCh. 12 - Prob. 3RQCh. 12 - Prob. 4RQCh. 12 - The neural cells responsible for the analysis of...Ch. 12 - Depolarization of a neuron plasma membrane will...Ch. 12 - Prob. 7RQCh. 12 - Receptors that bind acetylcholine at the...Ch. 12 - What are the major components of (a) the central...Ch. 12 - Prob. 10RQCh. 12 - Prob. 11RQCh. 12 - If the resting membrane potential of a neuron is...Ch. 12 - Prob. 13RQCh. 12 - What is the difference between anterograde flow...Ch. 12 - What is the functional difference among chemically...Ch. 12 - State the all-or-none principle cf action...Ch. 12 - Prob. 17RQCh. 12 - Prob. 18RQCh. 12 - What are the structural and functional differences...Ch. 12 - Describe the events that occur during nerve...Ch. 12 - Prob. 21RQCh. 12 - Prob. 22RQCh. 12 - Prob. 23RQCh. 12 - In multiple sclerosis, there is intermittent and...Ch. 12 - Prob. 25RQCh. 12 - Prob. 1CCCh. 12 - Prob. 2CC
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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
- Conformational changes in channel proteins brought about by voltage changes are responsible for opening and closing Na+ and K+ gates during the generation of an action potential. (True or false?)arrow_forwardWhat is the expected resting membrane potential (in mV) of a neuron that is typical in all ways except for possessing an intracellular potassium concentration of 94 mM and double the normal resting permeability to sodium?arrow_forwardSuppose 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.arrow_forward
- What is the equilibrium membrane potential due to Na+ ions if the extracellular concentration of Na+ ions is 154 mM and the intracellular concentration of Na+ ions is 23 mM at 20 ∘C ?arrow_forwardWhat do you think would happen to the neuronal action potential if the concentration of sodium ions in the extracellular fluid decreased significantly, to the point of reversing the gradient?arrow_forwardWhat is the role of ions, the phospholipid bilayer, and plasma membrane channels in neurons relative to the concepts of current, voltage, and resistance?arrow_forward
- 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.arrow_forwardThe normal concentrations for intracellular and extracellular potassium in a neuron are [K+]in = 150 mM and [K+]out = 5 mM, respectively. Due to an electrolyte imbalance, a patient has the following intracellular and extracellular concentrations of potassium: [K+]in = 140 mM and [K+]out =2 mM. Using the Nernst equation (Chapter 4), calculate the equilibrium potential for potassium in the cells with normal K+ distributions and of the diseased patient. Refer back to Question #1. Will it be easier or more difficult to generate an action potential in the diseased neuron as compared to the normal neuron? Why?arrow_forwardWhat kind of graded potential describes a change in membrane potential from 70 to 60 mV? From 70 to 80 mV?arrow_forward
- Why is the movement of ions across the plasma membrane important, and in which direction do ions move during each phase of the action potential?arrow_forwardThe following is a graph of membrane potential over time during an action potential. At which labeled point, A-D, would permeability to potassium (K+) be the greatest? A) B) C) D)arrow_forwardThe resting membrane potential of a neuron typically is 70 mV. What does this mean?arrow_forward
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