Intestinal lumen K CI Na Glucose លលលលលលលលា Cytosol K* CI Na* Glucose Lamina propria K* CI Na Glucose
Intestinal lumen K CI Na Glucose លលលលលលលលា Cytosol K* CI Na* Glucose Lamina propria K* CI Na Glucose
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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Question
The diagram below depicts an intestinal epithelial cell, as well as the relative concentrations of a number of different solutes. Sodium (Na+) ions within epithelial cells have a low concentration relative to that in the lumen and lamina propria, while chloride (Cl-) and potassium ions (K+), as well as glucose, have a relatively high concentration within the cell.
Which of the following requires active transport? (select two answers)
- transport of K+ and Cl- from the cytosol to the lamina propria
- transport of glucose from the intestinal lumen to the cytosol
- transport of Cl- from the cytosol to the intestinal lumen
- transport of Na+ from the lamina propria to the cytosol
- transport of K+ from the lamina propria to the cytosol
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