What is the cell membrane
The cell membrane is a biological membrane that seperates the interior of all cells of the outside enviorment
What is cholesterol and why is it important to the plasma membrane
Cholesterol is a sterol It is important because it helps maintain the rigidity of the cell membrane. Have too much and the cell is not permeable, have too little and the cell is too flexible
What is a micelle?
Micells are lipid molocules that form in a spherical form.
What is a lipid bilayer
The preferred structure of lipids in aqueous solutions. (Plasma membrane)
What is a vesicle?
Lipid bilayer in spherical shape. AKA Transporters within the cell.
Define the 5 different types of membrane proteins
1. Transmembrane - Span entirety of membrane, Usually function as gateways to permit substances across. 2. Intergral - Embedded within bilayer. 3. Peripheral - Attached to exterior of bilayer. Easily seperate off. 4. Associate Membrane Proteins 5. Anchored Membrane Proteins
Define a membrane domain
The association of the lipid membrane with the cytoskeleton filaments and the ECM through membrane proteins.
What is the most common type of Intergral Protein (IMP)
Transmembrane protein. There are multiple categories and they are based on how many times the TM passes the membrane
Explain the different types of lipid bilayer movements a fatty acid can do in the bi layer
Lateral diffusion: Most common (uncatalyzed) -Flip Flopping (catalyzed)
What are the 3 general classes of membrane transport systems?
What is membrane fusion and give an example
Membrane fusion is the process by which 2 seperate lipid bilayers merge and become 1.
Example: Sperm fusing with an egg
What solutes are in simple diffusion?
Non polar compounds traveling DOWN concentration gradient
Which type of membrane transport travels down electrochemical gradient NO ATP
Membrane transport requires ATP & against electrochemical gradient?
Primary ACTIVE transport
What it secondary active transport?
against electrochemical gradient, driven by ions movind down its gradient
Describe an ion channel
Down electrochemical gradient, can be ligand gated or not.