Extrinsic - Proteins found on the outer surface of the bilayer., Intrinsic - Proteins that span the whole bilayer., Polarity - Determines whether a protein will sit on the membrane or through it. , Permeability - Only allows certain things to pass through. , Channel Proteins - Pores lined with polar groups that allow charged ions through., Carrier Proteins - Allow larger polar molecules through, like water, soluble sugars and amino acids. , Water Potential - The tendency of water molecules to move. , Tonicity - Refers to the concentration of a solute., Hypertonic - Higher concentration of solute, meaning lower water potential., Hypotonic - Lower concentration of solute, meaning higher water potential., Isotonic - Same concentration of solute and the same water potential. , Co-transport - Where two different substances use the same carrier protein at the same time., Active transport - Moves molecules against the concentration gradient, this process requires ATP., Simple diffusion - Movement of molecules from a region of high concentration to a region of low concentration., Facilitated diffusion - Process where polar molecules or ions move from an area of high concentration to an area of low concentration.,

Cell membranes and transport

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