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25 Cards in this Set

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cell's outer boundary, covers the cell and acts as a barrier between the inside and outside of the cell
cell membrane
cells with a membrane-bound nucleus and membrane-bound organelles
eukaryote
the basic theory of the celluar basis of life; has 3 parts
cell theory
cells lacking a membrane-bound nucleus and membrane-bound organelles
prokaryote
Intracellular bodies that peform specific functions for the cells
organelle
Proteins in the cell membrane which assist in transport across the membrane
carrier protein
the difference in concentration of molecules across a space
concentration gradient
Organelles that remove excess water from the interior of unicellular organisms
contractile vacuole
The bursting of cells as a result of taking in too much water
cytolysis
Movement of molecules from areas of high concentration to areas of low concentration
diffusion
When the concentration of molecules is the same throughout the space
equilibrium
When the concentration of solute OUTSIDE the cell is higher than the concentration inside the cell
hypertonic
When the concentration of solute are equal inside and outside the cell
isotonic
The net movement of water through a semi-permeable membrante from areas of high concentration to areas of low concentration
osmosis
The movement of substances across the cell membrane which does not require any input of energy from the cell
passive transport
When the concentration of solute OUTSIDE the cell is LOWER than the concentration of solute inside the cell
hypotonic
Condition in which water leaves the cells through osmosis and the cells shrink away from the cell walls and turgor pressure is lost; this is why plants wilt.
plasmolysis
The pressure exerted by water molecules against the inside of the cell wall
turgor pressure
The movement of substances across the cell membrane which requires energy from the cell
active transport
The process by which cells ingest (eat) external fluid, macromolecules, and large particles including other cells
endocytosis
Cells in animals which ingest bacteria and viruses that invade the body
phagocyte
The movement of large particles or whole cells; a specific type of endocytosis
phagocytosis
The transport of solutes or fluids
pinocytosis
the process by which a substance is released from the cell through a vesicle
exocytosis
Used for molecules that are too big to diffuse through the cell membrane; a type of passive transport
facilitated diffusion