Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 6, Problem 18RA
Compare the resting membrane potential of a neuron with the potassium and sodium equilibrium potentials. Explain how this comparison relates to the relative permeabilities of the resting plasma membrane to these two ions.
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What 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?
describe what the resting membrane potential of a cell is. What is the resting membrane potential of neurons (give units)? What are the two factors that generate the resting membrane potential? Think of scenarios that change the factors that generate the resting membrane potential and how that would change the overall resting membrane potential.
Explain how the sodium–potassium pump and the properties of the membrane lead to the resting potential of a neuron.
Chapter 6 Solutions
Human Physiology
Ch. 6 - Describe the distribution of fluid in the body.Ch. 6 - Describe the composition of the extracellular...Ch. 6 - List the subcategories of passive transport and...Ch. 6 - Explain what is meant by simple diffusion and list...Ch. 6 - Prob. 4CPCh. 6 - Prob. 5CPCh. 6 - Explain how the body detects changes in the...Ch. 6 - Prob. 7aCPCh. 6 - Prob. 7bCPCh. 6 - Prob. 7cCP
Ch. 6 - Prob. 8CPCh. 6 - Prob. 9aCPCh. 6 - Prob. 9bCPCh. 6 - Explain the relationship of the resting membrane...Ch. 6 - Prob. 10bCPCh. 6 - Prob. 11CPCh. 6 - Prob. 12CPCh. 6 - The movement of water across a plasma membrane...Ch. 6 - Which of these statements about the facilitated...Ch. 6 - Prob. 3RACh. 6 - Prob. 4RACh. 6 - Blood plasma has an osmolality of about 300 mOsm....Ch. 6 - Prob. 6RACh. 6 - The most important diffusible ion in the...Ch. 6 - Prob. 8RACh. 6 - Prob. 9RACh. 6 - Prob. 10RACh. 6 - Prob. 11RACh. 6 - Prob. 12RACh. 6 - Prob. 13RACh. 6 - Prob. 14RACh. 6 - Which of the following questions regarding second...Ch. 6 - Prob. 16RACh. 6 - Prob. 17RACh. 6 - Compare the resting membrane potential of a neuron...Ch. 6 - Prob. 19RACh. 6 - Prob. 20RACh. 6 - Prob. 21RACh. 6 - Prob. 22RACh. 6 - Using the principles of osmosis, explain why...Ch. 6 - Prob. 24RACh. 6 - Prob. 25RACh. 6 - Prob. 26RACh. 6 - Prob. 27RACh. 6 - Prob. 28RACh. 6 - Prob. 29RACh. 6 - Prob. 30RACh. 6 - Using only the information in this chapter,...Ch. 6 - Prob. 32RACh. 6 - Prob. 33RACh. 6 - Suppose a semipermeable membrane separates two...Ch. 6 - Prob. 35RACh. 6 - Prob. 36RACh. 6 - Use the Nernst equation and the ion concentration...
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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_forwardAssume presynaptic excitatory neuron A terminates on a postsynaptic cell near the axon hillock and presynaptic excitatory neuron B terminates on the same postsynaptic cell on a dendrite located on the side of the cell body opposite the axon hillock. Explain why rapid firing of presynaptic neuron A could bring the postsynaptic neuron to threshold through temporal summation, thus initiating an action potential, whereas firing of presynaptic neuron B at the same frequency and the same magnitude of EPSPs may not bring the postsynaptic neuron to threshold.arrow_forwardA common membrane-bound intermediary between the receptor and the effector protein within the plasma membrane is the __________________.arrow_forward
- Describe the contribution of each of the following to the establishment and maintenance of membrane potential: Part A Na+K+ Pump Passive movement of K+ across the membrane Passive movement of Na+ across the membrane Part B Resting membrane potential is approximately -70mV. Explain what resting membrane potential is and what -70mV refers to.arrow_forwardThe resting membrane potential of a neuron typically is 70 mV. What does this mean?arrow_forward
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