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Cellular Transport

TermDefinition
Active Transport Movement of molecules across a cell membrane. Uses energy.
Carrier Protien Involved in the movement of ions, small molecules, or macromolecules, such as another protein, across a biological membrane.
Cell Membrane The semipermeable membrane surrounding the cytoplasm of a cell.
Channel Protien A protein that allows the transport of specific substances across a cell membrane.
Concentration Gradient The process of particles, which are sometimes called solutes, moving through a solution or gas from an area of higher number of particles to an area of lower number of particles.
Diffusion The process by which molecules intermingle as a result of their kinetic energy of random motion.
Endocytosis A form of active transport in which a cell transports molecules into the cell by engulfing them in an energy-using process.
Exocytosis A process in which an intracellular vesicle moves to the plasma membrane and subsequent fusion of the vesicular membrane and plasma membrane ensues.
Facilitated Transport The process of spontaneous passive transport of molecules or ions across a biological membrane
Fluid-mosaic Membrane Model Describes the plasma membrane of animal cells.
Glycolipid Membrane components composed of lipids that are covalently bonded to monosaccharides or polysaccharides.
Glycoprotein proteins that contain oligosaccharide chains covalently attached to polypeptide side-chains.
Hydrophilic Water loving
Hydrophobic Water fearing
Hypertonic concentration of solutes is greater outside the cell than inside it..
Hypotonic concentration of solutes is greater inside the cell than outside of it.
Isotonic concentration of solutes is the same both inside and outside of the cell.
Osmosis spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration
Passive Transport Processes A form of transport by which no energy is required, includes diffusion and facilitated diffusion
Phagocytosis the process by which a cell—often a phagocyte or a protist—engulfs a solid particle to form an internal vesicle known as a phagosome.
Phospholipid a class of lipids that are a major component of all cell membranes.
Phospholipid Bilayer a thin polar membrane made of two layers of lipid molecules.
Pinocytosis a mode of endocytosis in which small particles are brought into the cell, forming an invagination, and then suspended within small vesicles.
Pressure Gradient A physical quantity that describes which direction and at what rate the pressure changes the most rapidly around a particular location.
Selectively Permeable A type of biological membrane that will allow certain molecules or ions to pass through it by diffusion and occasionally specialized "facilitated diffusion"
Tonicity Measure of the effective osmotic pressure gradient of two solutions separated by a semipermeable membrane.
Created by: curquhar