BIOL 1000 Study Guide - Midterm Guide: Radio-Frequency Identification, Tonicity, Nuclear Membrane
Document Summary
Selective permeability: membranes that selectively allow, impede, or block the passage of atoms and molecules. Simple diffusion: mechanism by which certain small substances diffuse through the lipid part of a biological membrane. Facilitated diffusion: mechanism by which polar and charged molecules diffuse across membranes with the help of transport proteins. Channel protein: transport protein that forms a hydrophilic channel channel in a cell membrane though which water, ions, or other molecules can pass, depending on the protein. Carrier protein: transport protein that binds a specific single solute and transports it across the lipid bilayer. Integral protein: protein embedded in a phospholipid bilayer. Peripheral protein: protein help to membrane surfaces by noncovalent bonds formed with the polar parts of integral proteins or membrane lipids. Active transport: the mechanism by which ions and molecules move against the concentration gradient across a membrane, from the side with lower concentration to the side with higher concentration.
