Glucose enters the epithelial cells of the small intestine against its concentration gradient. Select the best explanation from
the following.Glucose is transported through a glucose ATPase in the apical membrane that hydrolyzes ATP to ADP and Pi to pump it in.Glucose enters the epithelial cells of the small intestine against its concentration gradient. Select the best explanation from the following.Glucose is transported through a glucose ATPase in the apical membrane that hydrolyzes ATP to ADP and Pi to pump it in.Glucose is co-transported with Na+, which moves down its concentration gradient into the cell.Glucose is co-transported in the Na+/K+ pump.Glucose follows the water that is pumped into the cell.Glucose enters by diffusion.Glucose is co-transported in the Na+/K+ pump.Glucose follows the water that is pumped into the cell.Glucose enters by diffusion.
The correct option is this: GLUCOSE IS CO-TRANSPORTED WITH Na+, WHICH MOVES DOWN ITS CONCENTRATION GRADIENT INTO THE CELL.
Explanation:
The small intestine is the place, where digested food molecules are absorbed so that they can be transported into the living cells through the blood stream. The glucose molecule is transported into the small intestine by mean of co-transport with sodium ions; this is an example of active transport. This form of transportation across the small intestines prevents the back flow of glucose molecules.
