| A | B |
|---|
| Lipid bilayer | double layered sheet that forms the core of nearly all cell membranes |
| Concentration | the mass of solute in a given volume of solution, mass\volume |
| Diffusion | process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated |
| Selective permeability | property of biological membranes thta allows only certain substances to pass through them |
| Osmosis | diffusion of water through a selectively permeable membrane |
| Facilitated diffusion | movement of specific molecules across cell membranes through protein channels |
| Endocytosis | process by which a cell takes material into the cell by infolding of the cell membrane |
| Phagocytosis | process by which extensions of cytoplasm surround and engulf large particles and take them into the cell |
| Exocytosis | process by which a cell releases large amounts of material |
| Cell specialization | seperate roles for each type of cell in multicelllular organisms |
| Tissue | group of similar cells that perform a particular function |
| Organ | group of tissues that work together to perform closely related functions |
| Organ system | group of organs that work together to perform a specific function |
