BIOL 1001 Chapter : Chapter 5 1
Document Summary
Cell membrane- all cells have a thin outer covering (aka plasma membrane) Why do we have membranes- keeps contents in, controls what goes on inside cell. Definitions: extracellular fluid (outside) carbohydrate protein glycoprotein binding site receptor protein phospholipid attachment protein phospholipid bilayer transport protein pore extra- cellular matrix cholesterol recognition protein enzyme cytoplasm (inside) cytoskeleton. Hormone binding activates the receptor, changing its shape (cytoplasm) The activated receptor stimulates a response in the cell. Transport: protein that regulates the movement of hydrophilic (attracted to water) molecules through the plasma membrane. Channel protein: a type of transport protein that forms a channel allowing water molecules or specific ions to pass through the membrane. Carrier protein: a type of transport protein that has binding sites that can temporarily attach to specific molecules on one side of the membrane and then move them through the membrane to the other side.
