Answer questions 1-5 about a cell that has:[ECF) of Na" = 142 mM, and K* = 4.6 mM(ICF] af Na* = 9 mM and K* = 155 mMThe membrane has eight (8) times more K leak channels than Na*leak channels.1. What is the resting membrane potential for this cell?2. What would the resting membrane potential be if a drug was administered that blacked Na" leak channels?3. To what would the membrane potential change if a stimulus apened an amount of Na* gated channels that was500 times greater than the number af Na* leak channels?4. What would be the direction of the Na* electrochemical gradient if the membrane potential were 80 mV?Into cellOut of cell5. How much mare permeable would the above cell be to patassium than sodium if the measured restingmembrane potential was -68 mv?

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(ECF) of Na" = 142 mM, and K4.6 mM (ICF) of Na = 9 mM and K = 155 mM The membrane has eight (8) times more K" leak channels than Na'leak channels. 1. What is the resting membrane potential for this cell?

(ECF) of Na" = 142 mM, and K4.6 mM (ICF) of Na = 9 mM and K = 155 mM The membrane has eight (8) times more K" leak channels than Na'leak channels. 1. What is the resting membrane potential for this cell?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter39: Information Flow And The Neuron

Section: Chapter Questions

Problem 5TYK: The major role of the Na+/K+ pump is to: a. cause a rapid firing of the action potential so the...

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.

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