There are differences in Na+, K+, and Cl- ion concentrations across the membrane. Knowing that ions like to flow down their respective concentration gradients explain how the movement of Cl- and K+ ions can result in membrane hyperpolarization.

There are differences in Na+, K+, and Cl- ion concentrations across the membrane. Knowing that ions like to flow down their respective concentration gradients explain how the movement of Cl- and K+ ions can result in membrane hyperpolarization.

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 4TAHL

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Question

There are differences in Na⁺, K⁺, and Cl^- ion concentrations across the membrane. Knowing that ions like to flow down their respective concentration gradients explain how the movement of Cl^- and K⁺ ions can result in membrane hyperpolarization.

Expert Solution

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Neurons are known to generate electrical signals when the permeability of the cell membrane is altered in response to particular ions. They include Na+, K+, Cl- etc. The potential difference so measured in most resting neurons ranges from 30 to 90 mV with the inside of the cell being more negative than the outside. The membrane is said to be polarized when there occurs a difference in the membrane potential.

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