The Na^+-glucose symport system of intestinal epithelial cells couples the \"dow
ID: 911980 • Letter: T
Question
The Na^+-glucose symport system of intestinal epithelial cells couples the "downhill" transport of two Na+ ions into the cell to the "uphill" transport of glucose, pumping glucose into the cell against its concentration gradient. If the Na^+ concentration outside the cell ([Na^+]_out) is 139 mM and that inside the cell ([Na^+]m) is 17.0 mM, and the cell potential is -50.0 mV (inside negative), calculate the maximum ratio of [glucose]in to [glucose]_out that could theoretically be produced if the energy coupling were 100% efficient. Assume the temperature is 37 degree C.Explanation / Answer
The Na^+-glucose symport system of intestinal epithelial cells couples the "dow