A cell biologist is performing an experiment using the voltage clamp method in which they are allowed to change the voltage in the membrane potential. They are wanting to record potassium currents and notice that for a certain membrane potential range, the voltage clamp highlights that there is an inward current of potassium. Would these readings make sense?

A cell biologist is performing an experiment using the voltage clamp method in which they are allowed to change the voltage in the membrane potential. They are wanting to record potassium currents and notice that for a certain membrane potential range, the voltage clamp highlights that there is an inward current of potassium. Would these readings make sense?

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 7UC: Describe the contribution of each of the following to establishing and maintaining membrane...

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Similar questions

Describe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.
Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of sodium chloride on side 1 is higher than on side 2. Which of the following ionic movements would occur? a. Na+ would move until its concentration gradient is dissipated (until the concentration of Na+ on side 2 is the same as the concentration of Na+ on side 1). b. Cl- would move down its concentration gradient from side 1 to side 2. c. A membrane potential, negative on side 1, would develop. d. A membrane potential, positive on side 1, would develop. e. None of the preceding is correct.
At rest, a neuron has a lower concentration of sodium than the surrounding fluid. The neuron also has a higher concentration of potassium inside the cell. The sodium-potassium ion pump is used to maintain the neuron in the resting state. Which of the following statements is true? A. Remaining at rest requires the use of ATP. B. Remaining at rest requires an input of sodium. C. Remaining at rest requires the activation of cotransporters. D Remaining at rest requires decreased permeability of the membrane.
Why is the resting membrane potential negative? Shouldn't it be positive as cells move in and out positive ions
Draw a sketch of a graph showing a complex AHP consisting of a first component AHP, an ADP, and a second component AHP before repolarization to resting membrane potential
When the membrane is at rest, what are the forces acting on potassium ions?A. Both the concentration gradient and the electrical gradient tend to move potassium ions into the cell.B. Both the concentration gradient and the electrical gradient tend to move potassium ions out of the cell.C. The concentration gradient tends to move potassium ions into the cell, and the electrical gradient tends to move them out of the cell.D. The concentration gradient tends to move potassium ions out of the cell, and the electrical gradient tends to move them into the cell.
What properties of ion channels allow them to generate the large, rapid changes in membrane potential?
Which of the following is ther eason why the potassium leaves the cell readily at the peak of the action potential?A) The sodium-potassium pumps work hard to return potassium to the extracellular fluid. B) Diffusion will continue to push potassium into the cell, but electrostatic pressure will move potassium out of the cell. C) Diffusion will push potassium out of the cell, but electrostatic pressure continues to attract potassium to the interior of the cell. D) Both diffusion and electrostatic pressure will cause potassium to exit the cell.
When the membrane is at rest, what are the forces acting on sodium ions?A. Both the concentration gradient and the electrical gradient tend to move sodium ions into the cell.B. Both the concentration gradient and the electrical gradient tend to move sodium ions out of the cell.C. The concentration gradient tends to move sodium ions into the cell, and the electrical gradient tends to move them out of the cell.D. The concentration gradient tends to move sodium ions out of the cell, and the electrical gradient tends to move them into the cell.
What happens to the membrane potential inside and outside of the cell when K+ channels are open?
The most important diffusible ion in the establishment of the membrane potential is a. K+. b. Na+. c. Ca2+. d. Cl−.
The above depolarization of a neuron will result in which of the following ionic currents? a potassium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions out of the cytoplasm a potassium current will transport K+ ions into the cytoplasm a sodium current will transport K+ ions out of the cytoplasm a sodium current will transport Na+ ions into the cytoplasm