How is it possible for the GABA activated chloride channel (GABA-A receptor) to switch the direction of ion flow during development? This occurs when the KCC2 transporter becomes active and transports chloride ions out of the cell to lower the chloride concentration inside the cell from 25mM to 4mM. Explain your answer using thermodynamic principles of ion flow through ion channels (passive diffusion while the channel is open). Hint: calculate deltaG (free energy change), R=8.315 J/mol *K, T=310K, F=96,500 J/(V*mol), membrane potential (delta psi) = -60mV (negative inside), Cl- concentration outside cell: 110mM
How is it possible for the GABA activated chloride channel (GABA-A receptor) to switch the direction of ion flow during development? This occurs when the KCC2 transporter becomes active and transports chloride ions out of the cell to lower the chloride concentration inside the cell from 25mM to 4mM. Explain your answer using thermodynamic principles of ion flow through ion channels (passive diffusion while the channel is open). Hint: calculate deltaG (free energy change), R=8.315 J/mol *K, T=310K, F=96,500 J/(V*mol), membrane potential (delta psi) = -60mV (negative inside), Cl- concentration outside cell: 110mM
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter11: Genome Alterations: Mutation And Epigenetics
Section: Chapter Questions
Problem 20QP: The cystic fibrosis gene encodes a chloride channel protein necessary for normal cellular functions....
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How is it possible for the GABA activated chloride channel (GABA-A receptor) to switch the direction of ion flow during development? This occurs when the KCC2 transporter becomes active and transports chloride ions out of the cell to lower the chloride concentration inside the cell from 25mM to 4mM.
Explain your answer using
Hint: calculate deltaG (free energy change), R=8.315 J/mol *K, T=310K, F=96,500 J/(V*mol), membrane potential (delta psi) = -60mV (negative inside), Cl- concentration outside cell: 110mM
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