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:

Biology Coursework: Osmosis Introduction: Osmosis: The movement of water molecules from dilute solution to a concentrated solution, through a semi-permeable membrane. Osmosis is a special form of diffusion only relevant to water. It occurs when a semi-permeable membrane separates two different concentrations of solution. Semi-permeable membranes have tiny holes or pores in them, which allow small particles, i.e. water, to pass through them; but prevent larger molecules passing through, e.g. glucose. An often-used example of a semi-permeable membrane, is that of 'Visking Tubing'. Visking tubing acts as a semi-permeable membrane in the body or a plant would, and contains the tiny holes required for osmosis. The visking tubing experiment involves water and sugar solution. Water molecules are very small - each consists of two hydrogen atoms and one oxygen atom. Sugar molecules are many times larger than this. The visking tubing allows the smaller water molecules to pass through, but not the sugar molecules,...

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 147,038 others

OR

Receive email updates for this category

• Simply tell us your email address and receive a weekly Study Help Email for FREE
• Receive 3 FREE essay views with each email
• Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk