How do Cellular Structures Facilitate Water Transport?
Cell membranes play a critical role in water transport. The lipid bilayer of the membrane is selectively permeable, allowing water to pass through but restricting other molecules. Aquaporins embedded in the cell membrane significantly enhance the rate of water transport. Additionally, tight junctions between epithelial cells help regulate paracellular water transport, maintaining homeostasis in tissues such as the kidneys and intestines.
