The Na"/glucose symport transports glucose from the lumen of the small in-testine into cells lining the lumen. Transport of 1 glucose molecule is directlycoupled to the transport of 1 Na* ion into the cell.1 Na"out + 1 glucose,ut→1 Na¨m+1 glucose.Assume the following conditions at 37 °C: [Na"Jm = 12 mM, [Na"Jout =145mM, [glucose]out =28 µM, and A =-72 mV (inside negative).(a) What is AG for transport of Na* from outside to inside under theseconditions?(b) What is the upper limit for [glucose], under these conditions?(c) Which of the two hypothetical symports shown below (A or B) wouldachieve the highest concentration of [glucose]n under the conditionsdescribed above? Briefly explain your choice.A: 1 Na"out +2 glucoseut + 1 Na" in +2 glucosenB: 2 Na1+1 glucoseut → 2 Na in +1 glucosenout

Given, Temperature =37° C[Na+]in =12 mM[Na+]out = 145 mM[glucose]out =28 μM∆ψ=-72 mV

Answered: The Na"/glucose symport transports…

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

Chapter9: Cell Communication

Section: Chapter Questions

Problem 3ITD

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