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:

Human Physiology Osmosis Osmosis is a special type of diffusion that includes only moving water molecules in the presence of a selectively permeable membrane. It can be defined as: ' The movement of water molecules from a region of high concentration to a region of low concentration through a selectively permeable membrane ' A selectively permeable membrane is a thin sheet that allows certain small molecules to pass through but not larger molecules. In a living body there are many types of selectively permeable membranes such as: * The plural * The peritoneum However, the most selectively permeable membrane you will hear about is a cell membrane around every living cell. In the laboratory we can mimic the cell membrane by using a product known as Visking Tubing that was developed for use in kidney machines for renal dialysis. Active Transport There are many examples of materials passing through living cell membranes against a concentration gradient, i.e. passing from...

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 146,209 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