Absorption of glucose in the intestine is by(2018)
The transpo of glucose and galactose depends on Na+ in the intestinal lumen; a high concentration of Na+ on the mucosal surface of the cells facilitates sugar influx into the epithelial cells while a low concentration inhibits sugar influx into the epithelial cells. Because the intracellular Na+ concentration is low in intestinal cells (as it is in other cells), Na+ moves into the cell along its concentration gradient. Glucose moves with the Na+ and is released in the cell (Figure 26-2). The Na+ is transpoed into the lateral intercellular spaces, and the glucose is transpoed by GLUT2 into the interstitium and thence to the capillaries. Thus, glucose transpo is an example of secondary active transpo the energy for glucose transpo is provided indirectly, by the active transpo of Na+ out of the cell. Ref:- Ganong, pg num:- 478
Primary active transpo
Secondary active transpo
Facilitated diffusion
Simple diffusion
G.I.T