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SLS Bio12 cell t MM

SLS bio12 cell transport MM

TermDefinition
Active Transport Use of plasma membrane carrier protein and energy to move a substance into or out of a cell from lower to higher concentration
Carrier Protein Protein molecule that combines with a substance and transports it through the plasma membrane
Cell Membrane composed of a phospholipid bilayer which is actively selectively permeable, as molecules both actively and passively move in and out of the cell.
Channel Protein Forms a channel which allows a particular molecule or ion to cross the plasma membrane
Concentration Gradient Gradual change in chemical concentration from one point to another
Diffusion movement of molecules or ions from a region of higher to lower concentration; it requires no energy and stops when the distribution is equal.
Endocytosis Process by which substances are moved into the cell from the environment by phagocytosis or pinocytosis
Exocytosis Process in which an intracellular vesicle fuses with the plasma membrane so that the vesicles contents are released outside the cell.
Facilitated Transport Use of a plasma membrane carrier to move a substance in and or out of a cell from higher to lower concentration, no energy required.
Fluid-mosaic membrane model The phospholipid bilayer is represented as being fluid, and the proteins embeded are the mosaic components along with both glycolipids and glycoproteins.
Glycolipid Lipid in a plasma membrane that bears a carbohydrate chain attached to a hydrophobic tail
Glycoprotein Protein in a plasma membrane that bears a carbohydrate chain
Hydrophilic water loving- Type of molecule that interacts with water by dissolving in water and or forming hydrogen bonds with water molecules.
Hydrophobic water hating- type of molecule insoluble in water as it is non polar, does not interact with water
Hypertonic Higher solute concentration outside the cell than inside the cell --> causes cell to lose water through osmiosis
Hypotonic Lower solute concentration outside the cell than inside and causes net movement of water inside the cell to be positive
Isotonic Solution where solute concentrations are equal inside and outside the cell and there is no water net movement
Osmosis Diffusion of water through a selectively permeable membrane
Passive transport Transport which moves down the concentration gradient and requires no energy
Phagocytosis Process by which amoeboid type cells engulf large substances, forming an intra-cellular vacuole- cell eating
Phospholipid molecule with phosphate polar waterloving head, and two non polar water hating tails
Phospholipid bilayer Two layers of phospholipids, makes up the cell membrane which is selectively permeable and allows small molecules such as oxygen and carbon dioxide
Pinocytosis Cell drinking, process which vesicle formation brings dissolved macromolecules into the cell
Pressure gradient Gradual descent as concentrations decrease, allowing molecules to pass with no ATP and just natural kinetic energy.
Selectively permeable Actively selecting which molecules will enter and which may not enter.
Tonicity the measure of osmiotic pressure
Created by: madym