Diffusion And Osmosis Cellular Processes PDF

Diffusion and Osmosis  Cellular Transport —Some molecules, such as water, pass freely. This is called _passive_____ __transport____. — Others that do not pass freely must be carried through channels and require ___Enegry_____. This is called __active ___ __trnas...

Diffusion and Osmosis  Cellular Transport —Some molecules, such as water, pass freely. This is called _passive_____ __transport____. — Others that do not pass freely must be carried through channels and require ___Enegry_____. This is called __active ___ __trnasport____. What is diffusion? Diffusion is when particles move along a _concentration______ __gradient_____ from __high__ to _low____ concentration. —Molecules pass ____directly___ through the lipid bilayer without the help of channels — _No_ ____energy___is required! — Like riding a bike downhill, molecules are moving DOWN the concentration gradient Diffusion Diffusion A classic example of diffusion occurs when you use a scent Example diffuser. The scented molecules disperse from the area of high concentration to regions of lower concentration, enabling you to detect the fragrance throughout the space. The scent "diffuses" into the air.  What is osmosis? _____osmosis__ is when _wster____ moves through a partially permeable membrane from ___high__ to ___low_ concentration. Osmosis Osmosis Red blood cells take in and lose Example water by osmosis. In a concentrated solution, red blood cells shrink and lose water. In a dilute solution, red blood cells gain water, swell and could burst. It is a very fine balance.