Your friend has made an artificial membrane to study ion concentration gradients in alaboratory and is confused after observing the ion concentration gradient in the imagebelow. Initially (Time 1) there was a very strong concentration gradient across themembrane and your friend expected that ions would move until the concentrations wereequal across the membrane.For a short time there was movement of ions but this soon stopped and there is no furtherchange in the situation no matter how long you wait (see Time 2).Time 1You friend is confused because there is still a strong concentration gradient and there areopen ion channels available. So why don't the concentrations equalise?After thinking about it you realise that there must be some information that is incorrect ormissing from the diagram above.Select the image below that explains why the ion concentrations remain unequalacross the membraneTime 2Select the correct image by clicking on it (you can only select one image).Time 2||||||||||Time 2Time 2Time 2

Artificial membrane It is also called a synthetic membrane which is created to mimic a cell membrane…

After thinking about it you realise that there must be some information that is incorrect or missing from the diagram above. Select the image below that explains why the ion concentrations remain unequal across the membrane Select the correct image by clicking on it (you can only select one image). Time 2 HHE Time 2 Time 2 Time 2

After thinking about it you realise that there must be some information that is incorrect or missing from the diagram above. Select the image below that explains why the ion concentrations remain unequal across the membrane Select the correct image by clicking on it (you can only select one image). Time 2 HHE Time 2 Time 2 Time 2

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 2TAHL: Assume that a membrane permeable to Na+ but not to Cl- separates two solutions. The concentration of...

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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.
Chloride ions (Cl-) are in higher concentration outside of the cell compared to the intracellular fluid (ICF). If a cell is at rest and chloride-specific ion channels open, identify what would happen. Choose ALL of the correct answers. 1 Some chloride will enter the cell, but the concentration gradient for chloride will not change much. 2 The membrane will hyperpolarize 3 Chloride will come into the cell until it reaches chemical equilibrium. 4 The membrane potential won't change. 5 The membrane will depolarize 6 Some chloride will leave the cell, but the concentration gradient for chloride will not change much
The resting potential of most cells is most dependent concentration gradient of: on the transmembrane Chloride Sodium Potassium Calcium
What happens across the membrane of an electricallyactive cell is a dynamic process that is hard to visualizewith static images or through text descriptions. View thisanimation (http://openstaxcollege.org/l/dynamic1) toreally understand the process. What is the differencebetween the driving force for Na+ and K+? And what issimilar about the movement of these two ions?
Two scientists calculated the membrane potential of a neuron using two different equations, the Nernst equation and the Goldman equation. Their calculations gave them slightly different predictions. What is the most likely reason for this difference? The lipid compositions of the cell membranes that the scientists studied were different. The scientists placed their measuring electrodes in slightly different positions. The temperatures of the fluid surrounding the cell membranes were different. The numbers of ions considered in the calculations were different. The scientists measured different numbers of cells.
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A solution of water and dissolved ions is separated by a selectively permeable membrane that allows the passage of water but not small ions. The concentration of sodium is higher on one side of the membrane than onthe other side. However, there is no net movement of water across the membrane. How is this possible?
The membrane potential for an excitable cell membrane is -70 mV, for sodium ions the Nernst equilibrium potential is +50 mV, the conductivity of the single sodium channel is 10 pS. What is the electrochemical potential difference that is the driving force for sodium ions to migrate? How much current flows through an open sodium channel under these conditions?
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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?
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