Cell Membrane and Transport Processes

Front

Osmosis

Back

Diffusion of water through a selectively permeable membrane

Front

Cell membrane (plasma membrane)

Back

Phospholipid bilayer that surrounds all cells and regulates what enters and leaves the cell

Front

Semi-permeable / Selectively permeable

Back

A membrane that permits the passage of only certain molecules

Front

Isotonic solution

Back

A solution with the same concentration of water and solutes as inside a cell, resulting in no net movement of water

Front

Dynamic equilibrium

Back

Condition of continuous, random movement of particles but no overall change in concentration of materials

Front

Hypotonic solution

Back

Solute concentration is less than that inside the cell; cell gains water

Front

Hypertonic solution

Back

Solute concentration is greater than that inside the cell; cell loses water

Front

Active transport

Back

Movement of materials through a cell membrane using energy; molecules move against the concentration gradient (low to high)

Front

Passive transport

Back

Requires no energy, movement of molecules from high to low concentration, moves with the concentration gradient

Front

Diffusion

Back

Process by which molecules move from an area of higher concentration to an area of lower concentration