The document discusses cell membranes. It explains that a cell membrane is a double layered sheet of phospholipids containing protein channels and carbohydrate chains. The cell membrane keeps harmful particles out and allows helpful particles in via protein channels, acting as a barrier. Diffusion is the process where equilibrium is reached through the membrane, allowing higher solute concentrations to pass through. Alzheimer's and Duchenne muscular dystrophy affect the cell membrane, with Alzheimer's altering phospholipids and dystrophy preventing membrane repair.

1. By James Bascom

2. What it is/does What it is It is double layered sheet of Phospholipids, containing Protein Channels and Carbohydrate Chains What it Does Keeps harmful particles out of the cell Allows only certain helpful particles into the cell via Protein Channel Acts as a general Barrier for the cell

3. Diffusion and Membranes Diffusion: The process in which an equilibrium reached via the membrane Simply means: The Membrane lets higher concentrations of a solute through to reach an equality on both sides

4. Alzheimer’s and Other Diseases Alzheimer's Disease Duchenne Muscular Dystrophy Causes the Phospholipids in the Membrane to altercate, which compromises the Membrane Affects Dystrophin in the cell which prevents the Membrane from repairing itself

5. Work Cited http://newsdesk.org/wp-content/uploads/2010/03/phpJs0wk2PM.jpg http://www.ehow.com/list_6368550_cell-membrane-diseases.html http://library.thinkquest.org/C004535/media/cell_membrane.gif http://www.biologyjunction.com/images/cell20membrane.jpg http://2.bp.blogspot.com/_oCXP3wyQN9w/SdjV-wSEwnI/AAAAAAAABd4/xe8yMv0yVhg/s400/Simple+diffusion+through+plasma+membrane.jpg