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Dr. Brainy decides to make a new cell that ONLY has one ion channel in its membrane. This channel is a non-specific cation channel that is permeable to both sodium and potassium, but not other ions. This non-selective cation channel is open at rest. She measures the concentration of sodium and potassium ions and finds: Sodium Potassium Inside Outside Equilibrium Potential 1mM 10mM +58mV 10mM 1mM -58mV Dr. Brainy measures the membrane potential and finds that : the resting membrane potential will approach 0 mV because K+ and Na+ ions repel one another in the pore of the channel, leading to no flow of ions through this channel. the resting membrane potential will be negative because the driving force on potassium to leave the cell is much greater than the driving force on sodium to enter the cell the resting membrane potential is positive because K+ ions are larger than sodium ions and block the entry of sodium into the cell the resting membrane potential will approach 0 mV because K+ ion efflux is equally balanced with Na+ ion influx

Dr. Brainy decides to make a new cell that ONLY has one ion channel in its membrane. This channel is a non-specific cation channel that is permeable to both sodium and potassium, but not other ions. This non-selective cation channel is open at rest. She measures the concentration of sodium and potassium ions and finds: Sodium Potassium Inside Outside Equilibrium Potential 1mM 10mM +58mV 10mM 1mM -58mV Dr. Brainy measures the membrane potential and finds that : the resting membrane potential will approach 0 mV because K+ and Na+ ions repel one another in the pore of the channel, leading to no flow of ions through this channel. the resting membrane potential will be negative because the driving force on potassium to leave the cell is much greater than the driving force on sodium to enter the cell the resting membrane potential is positive because K+ ions are larger than sodium ions and block the entry of sodium into the cell the resting membrane potential will approach 0 mV because K+ ion efflux is equally balanced with Na+ ion influx

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Dr. Brainy decides to make a new cell that ONLY has one ion channel in its membrane. This channel is a non-specific cation channel that is permeable to both sodium and potassium, but not other ions. This non-selective cation channel is open at rest. She measures the concentration of sodium and potassium ions and finds: Sodium Potassium Inside Outside Equilibrium Potential 1mM 10mM +58mV 10mM 1mM -58mV Dr. Brainy measures the membrane potential and finds that : the resting membrane potential will approach 0 mV because K+ and Na+ ions repel one another in the pore of the channel, leading to no flow of ions through this channel. the resting membrane potential will be negative because the driving force on potassium to leave the cell is much greater than the driving force on sodium to enter the cell the resting membrane potential is positive because K+ ions are larger than sodium ions and block the entry of sodium into the cell the resting membrane potential will approach 0 mV because K+ ion efflux is equally balanced with Na+ ion influx
Transcribed Image Text:Dr. Brainy decides to make a new cell that ONLY has one ion channel in its membrane. This channel is a non-specific cation channel that is permeable to both sodium and potassium, but not other ions. This non-selective cation channel is open at rest. She measures the concentration of sodium and potassium ions and finds: Sodium Potassium Inside Outside Equilibrium Potential 1mM 10mM +58mV 10mM 1mM -58mV Dr. Brainy measures the membrane potential and finds that : the resting membrane potential will approach 0 mV because K+ and Na+ ions repel one another in the pore of the channel, leading to no flow of ions through this channel. the resting membrane potential will be negative because the driving force on potassium to leave the cell is much greater than the driving force on sodium to enter the cell the resting membrane potential is positive because K+ ions are larger than sodium ions and block the entry of sodium into the cell the resting membrane potential will approach 0 mV because K+ ion efflux is equally balanced with Na+ ion influx
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