Question

During cotransport with sodium ions, glucose is (actively/passively) transported into the

cell by the concentration gradient established through the Na+/K+ pump____

Answer 1

The sodium-glucose symporter uses sodium ions to "pull" glucose molecules into the cell against its concentration gradient.

Step-by-step explanation:

Symporters are secondary active transporters that move two substances in the same direction. The sodium-glucose symporter uses sodium ions to "pull" glucose molecules into the cell. Because cells store glucose for energy, glucose is typically at a higher concentration inside of the cell than outside. However, due to the action of the sodium-potassium pump, sodium ions will easily diffuse into the cell when the symporter is opened. The flood of sodium ions through the symporter provides the energy that allows glucose to move through the symporter and into the cell, against its concentration gradient.