Cell Membranes Terms Active transport - The transport of molecules across a membrane and against their natural flow; mediated by carrier proteins and requiring outside energy. Carrier protein - A protein responsible for mediating the active transport of molecules from one side of the lipid bilayer to the other. Transport is carried out by a conformational change that occurs within the protein that forms an opening for specific molecules to pass through. Channel protein - A protein responsible for mediating the passive transport of molecules from one side of the lipid bilayer to the other. Transport is carried out by its membrane-spanning hydrophilic structure which, when open, allows molecules to pass through. Diffusion - The transport process in which molecules naturally travel from an area of higher concentration to an area of lower concentration. Glycocalyx - A layer of carbohydrates that coats the exterior of higher-ordered cells. Functions in protecting the cell from damage.
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 01/27/2012 for the course BIOLOGY BSC1005 taught by Professor Rodriguez during the Winter '09 term at Broward College.