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Ch. 8.1
vocabulary
11
Biology
10th Grade
02/12/2013

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Term
osmosis
Definition
the diffusion of water across a selectively permeable membrane
Term
isotonic solution
Definition
a solution in which the concentration of dissolved substances outside the cell is the same as the concentration inside the cell
Term
hypotonic solution
Definition
a solution in which the concentration of dissolved substances outside the cell is lower than the concentration inside the cell
Term
hypertonic solution
Definition
a solution in which the concentration of dissolved substances outside the cell is higher than the concentration inside the cell
Term
passive transport
Definition
this is the movement of particles across the plasma membrane by diffusion; it requires no energy
Term
facilitated diffusion
Definition
the passive transport of materials across the plasma membrane with the aid of transport proteins
Term
active transport
Definition
this is the movement of particles across the plasma membrane against the concentration gradient; it requires energy
Term
endocytosis
Definition
process by which a cell takes in material by forming a vacuole around it.
Term
exocytosis
Definition
the process by which a cell expels wastes from a vacuole
Term
homeostasis
Definition
the process of maintaining balance in the cell's environment
Term
carrier protein
Definition
a protein that transports substances out of or into a cell across the cell membrane
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