While chemical signals such as morphogens have been known for a long time, fluid transport has recently emerged as another potential way to globally organize cell behavior during morphogenesis (Navis ...

eg urea No Osmosis Water moves from a high to a lower concentration across a partially permeable membrane and down a concentration gradient Water No Active transport Substances more from low to ...

The passage of these molecules relies on specific transport proteins embedded in the membrane. Membrane transport proteins are specific and selective for the molecules they move, and they often ...