A Cell In Its Environment
cell membrane
A cell structure that controls which substances can enter or leave the cell.
Exocytosis
a process by which the contents of a cell vacuole are released by the cell membrane.
selectively permeable
a property of cell membranes that allows some substances to pass through, while others cannot
active transport
the movement of materials through a cell membrane using energy
passive transport
the movement of substances across a cell membrane without the use of energy by the cell
Osmosis
diffusion of water across a selectively permeable membrane
Endocytosis
process by which a cell takes material into the cell by engulfing it and turning it into a vacuole.
Diffusion
the process by which molecules move from an area of higher concentration to an area of lower concentration
