CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Textbook Question
Chapter 28, Problem 2TYK
The inside of the neuron has a lower concentration of positive ions than the outside of the neuron. Is the membrane potential positive or negative?
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Chapter 28 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
Ch. 28 - Test your understanding of the nervous system by...Ch. 28 - The inside of the neuron has a lower concentration...Ch. 28 - Prob. 3TYKCh. 28 - What causes a nerve signal to move from one end of...Ch. 28 - Prob. 5TYKCh. 28 - Prob. 6TYKCh. 28 - Anesthetics block pain by blocking the...Ch. 28 - Prob. 8TYKCh. 28 - Using microelectrodes, a researcher recorded nerve...Ch. 28 - Prob. 10TYK
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- 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_forwardThe above depolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions into the cytoplasmarrow_forwardWhat is the difference between the membrane potential in a normal cell and an excitable cell?arrow_forward
- What 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_forwardWhat is the typical resting membrane potential of a neuron?arrow_forwardHow much of a change in the membrane potential is necessary for the summation of postsynaptic potentials to result in an action potential being generated?arrow_forward
- The sodium-potassium pump is really important to the functioning of neurons. (a) What does it do? (b) Why type of transport is it responsible for? Explain. (c) Imagine a person is exposed to a drug that destroys the sodium-potassium pump. How will this impact their neuron? Explain.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_forwardA cell biologist is performing an experiment using the voltage clamp method in which they are allowed to change the voltage in the membrane potential. They are wanting to record potassium currents and notice that for a certain membrane potential range, the voltage clamp highlights that there is an inward current of potassium. Would these readings make sense?arrow_forward
- 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.arrow_forwardHow can only positive ions result in depolarization and repolarization of the membrane during an action potential?arrow_forwardThe above depolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport K+ ions out of the cytoplasm E. a sodium current will transport Na+ ions into the cytoplasmarrow_forward
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