DescriptionOsmotic Pressure and a Semipermeable Membrane.png
English: The image shows a simple phospholipid membrane. Na+ and Cl- ions are found on both sides, but the concentration is greater in the extracellular fluid. An arrow shows the flow of water to the extracellular fluid due to osmotic pressure
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Captions
Osmotic pressure drives water through the phospholipid bilayer due to a concentration gradient of salt.