Plasma Membrane

 This week in AP Biology, we talked about the plasma membrane, what its job is,things that happen within the membrane, and the parts of the membrane. The plasma membrane is composed up of a phosolipid bi-layer and it is the boundary of a cells between life and non life. It is also amphipathic, which means that it is both hydrophilic and hydrophobic. We also talked about endocytosis and exocytosis. Endocytosis is when materials move into the cell and exocytosis is when materials are moved out of the cell. Another thing we discussed in class was diffusion and osmosis. Diffusion is just transporting materials into the cell and osmosis is transporting water into the cell. Also Also another thing that deals with osmosis is hypertonic, hypotonic, and isotonic solutions. Which just means the amount of water and the amount of concentration. Hypotonic is when there is more solute than solvent, hypertonic is when there is more solvent then solute, and isotonic is when they are both equal. As you can see we discussed about several things this week and it was all really interesting.




Plasma Membrane:



Hypertonic, Hypotonic, Isotonic: