Question

Choose either the sodium-potassium transport mechanism or the sodium-glucose transport mechanism. The file can be either a diagram you create yourself or an essay format answer to the question.

Depict or describe the process and mechanism of the transport you choose. Make sure to indicate the overall outcome, where the energy comes from, and how the membrane protein(s) facilitate the transport process. If you choose a diagram, make sure to clearly indicate the inside vs. the outside of the cell.

Answer 1

Na+-glucose transport : it is a type of secondary active transport that occurs when endergonic transport of one solute is coupled with the exergonic flow of different solute that was originally pumped uphill by primary active transport.

Na+- glucose symporters are a family of glucose transporters present on the apical surface if epithelium and actively transport glucose molecule into the cell. The Na+ flows down their concentration gradient while the glucose molecule are transported against their concentration gradient into the cell. Later Na+ is pumped back out of the cell by Na+-K+ ATPase and thus maintaining the inward Na+ gradient.