Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Osmosis in Potato Cells Scientific Theory Osmosis is similar to diffusion, but a little different. It is the movement of water molecules across a partially permeable membrane, from a region of high water concentration to a region of low water concentration, (along a concentration gradient). A partially permeable membrane, is a membrane with tiny holes, however these holes are so tiny that only water molecules can pass through and no other substance, for example glucose. When a substance, for instance sugar, dissolves in water it attracts the water molecules and stops them from moving freely, this actually reduces the concentration of water. In the diagram above, there are more free water molecules on the right of the membrane than on the left. Therefore water will diffuse more rapidly from right to left across the membrane, rather than left to right. The sugar molecules can diffuse from left to right across the membrane, but because they...

Get instant access

• Instant, unlimited access to our documents in full
• Swap your work for free access, or pay £4.99
• To see the full version of this document and 151,713 others