**Understanding the Role of Potassium Ions in Muscle Repolarization****Scenario:**A patient was administered potassium ions intravenously and subsequently exhibited a rapid return to normal muscle function. The question at hand investigates the underlying reasons for the normalization of muscle membrane repolarization following the potassium infusion.**Question:**Which of the following reasons explains why repolarization of the muscle membrane returned to normal after the potassium infusion?**Options:**1. The potassium ions that were infused into body fluids remained in the extracellular fluid (ECF) and helped open potassium channels.2. The potassium ions that were infused into body fluids moved into the intracellular fluid (ICF) and diffused out during repolarization at a normal rate.3. The potassium ions that were infused into body fluids moved into the ICF and eliminated the state of hyperpolarization that was present.4. Both b and c.### Explanation of Options:**Option A:**- Suggests potassium ions remained in the ECF.- Assumes they played a role in opening potassium channels.- However, the primary effect of potassium ions involves their movement across the cell membrane.**Option B:**- Indicates potassium ions moved into the ICF.- Suggests that the normal rate of diffusion out of cells during repolarization was maintained, thus normalizing the process.**Option C:**- States that potassium ions entered the ICF.- Implies they corrected any hyperpolarization state, thus aiding in normalization.**Option D:**- Combines the effects described in options B and C.**Explanation for Correct Options:**Potassium ions typically function to reset the membrane potential of cells. By moving into the intracellular fluid, potassium ions help restore the electrical balance necessary for proper muscle function. Repolarization, a critical phase in the action potential of muscle cells, relies significantly on the efflux of potassium ions.**Conclusion:**The correct inferences would involve understanding the integral role of potassium in cellular electrophysiology, specifically how it relates to muscle cell function and the action potential process. Therefore, the correct answer reflects both the diffusion of potassium ions into the ICF and the correction of hyperpolarization state.**Graph/Diagram Explanation:**There are no graphs or diagrams included within the text provided. If graphs or diagrams were to be included for educational purposes, they should illustrate the dynamics of potassium ion movement across cell membranes and its impact on muscle cell repolarization

This patient was given potassium ions intravenously and regained normal muscle functioning in a very short period of time. Which of the following reason/s explains why repolarization of the muscle membrane returned to normal after the potassium infusion? O the potassium ions that were infused into body fluids remained in the ECF and helped open potassium channels O the potassium ions that were infused into body fluids moved into the ICF and diffused out during repolarization at a normal rate O the potassium ions that were infused into body fluids moved into the ICF and eliminated the state of hyperpolarization that was present O b and c

This patient was given potassium ions intravenously and regained normal muscle functioning in a very short period of time. Which of the following reason/s explains why repolarization of the muscle membrane returned to normal after the potassium infusion? O the potassium ions that were infused into body fluids remained in the ECF and helped open potassium channels O the potassium ions that were infused into body fluids moved into the ICF and diffused out during repolarization at a normal rate O the potassium ions that were infused into body fluids moved into the ICF and eliminated the state of hyperpolarization that was present O b and c

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

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter8: Muscle Physiology

Section: Chapter Questions

Problem 2SQE

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