Consider a solute having a permeability coefficient of 10-6 m s-1 for the plasma membrane of a cylindrical Chara cell that is 100 mm long and 1 mm in diameter. Assume that its concentration remains essentially uniform within the cell. Untitled Title A. How much time would it take for 90% of the solute to diffuse out into a large external solution initially devoid of that substance?* B. How much time would it take if diffusion occurred only at the two ends of the cell?* C. How would the times calculated in A and B change for 99% of the solute to diffuse out? D. How would the times change if Pj were 10-8 m s-1?*
Consider a solute having a permeability coefficient of 10-6 m s-1 for the plasma membrane of a cylindrical Chara cell that is 100 mm long and 1 mm in diameter. Assume that its concentration remains essentially uniform within the cell. Untitled Title A. How much time would it take for 90% of the solute to diffuse out into a large external solution initially devoid of that substance?* B. How much time would it take if diffusion occurred only at the two ends of the cell?* C. How would the times calculated in A and B change for 99% of the solute to diffuse out? D. How would the times change if Pj were 10-8 m s-1?*
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 6RE
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Question
Consider a solute having a permeability coefficient of 10-6 m s-1 for the plasma membrane of a cylindrical Chara cell that is 100 mm long and 1 mm in diameter. Assume that its concentration remains essentially uniform within the cell.
Untitled Title
A. How much time would it take for 90% of the solute to diffuse out into a large external solution initially devoid of that substance?*
B. How much time would it take if diffusion occurred only at the two ends of the cell?*
C. How would the times calculated in A and B change for 99% of the solute to diffuse out?
D. How would the times change if Pj were 10-8 m s-1?*
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