Diffusion and Osmosis. Lab 2 Background. Membranes. Phospholipid bilayer containing embedded proteins Fatty acids limit the movement of water because of their _______________. Water. Passes freely through the membrane by osmosis or through aquaporins .
Lab 2 Background
* In walled cells, osmosis is affected by [solute] & resistance to water movement in the cell by the cell wall (known as Turgor Pressure).
*ATP and protein carriers called Pumps are required to move solute from areas of low  to areas of high .
*pressure potential = exertion of pressure
* Solute potential = [solute]
C= molar concentration
R= pressure constant = 0.0831
T= temp in K (273 + degree Celcius)
* Bar- a metric measure of pressure and is the same as 1 atmosphere at sea level
* Cut 3 square blocks of agar (1cm, 2cm & 3cm)
*Don’t forget to record your rate of diffusion.