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Title: Help with Diffusion and Membrane Potential (electrical gradient) Post by: seanoh on Mar 11, 2013 Hey guys I can't seem to figure this one out. A little help would be greatly appreciated it. Thanks!
1. Assume that a membrane permeable to sodium but not to chloride separates two solutions. Concentration of sodium chloride on side 1 of the membrane is much higher than on side 2. Which of the following would occur? Why? - Na+ will move until its concentration gradient is dissipated. - Cl- will move down its concentration gradient from side 1 to side 2. - A membrane potential, negative, on side 1 will develop - A membrane potential, positive, on side two will develop. Support your answer with explanations (2) I basically think that a positive membrane potential will develop on side 2 because the sodium ions, which are positive will flow into it. I also think the Na+ (sodium ions) will move until its concentration gradient is dissipated but I am not sure why. Title: Re: Help with Diffusion and Membrane Potential (electrical gradient) Post by: bio_man on Mar 11, 2013 I would choose:
Sodium would move from side 1 to side 2, establishing a negative membrane potential on side 1. |