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:

Investigation to find the water potential of a plant cell. Introduction: - Theory: Plant cells are made up of a phospholipid bilayer (fig. 1). There are hydrophilic heads, which face the liquid medium in and around the cells. A hydrophobic tail attached to the head, which face inwards. These tails are non-polar. Non-polar molecules like oxygen can diffuse through the membrane easily. Water, despite being a polar molecule, can also diffuse rapidly across the membrane because it is so small. Big polar molecules and ions can not pass straight through the membrane, e.g. Na+, Cl- and glucose. These molecules can only pass the membrane through protein channels, which only allow specific molecules in. (fig. 1) Diagram of cell membane. 7nm phospholipid width bi-layer. Water molecules posses kinetic energy in that, when together in liquid or gas form, they move about very rapidly in random directions. When water...

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 149,958 others