Terms in this set (17)
A lipid that contains phosphorus and that is a structural component in cell membranes.
two-layer "sandwich" of molecules that make up the cell membrane.
A property of cell membranes that allows some substances to pass through, while others cannot.
Movement of substances through a cell membrane without the use of cellular energy. Substances move from a high concentration to a low concentration. Includes diffusion, osmosis, and facilitated diffusion.
Movement of molecules from an area of higher concentration to an area of lower concentration.
State when the concentrations of molecules are the same throughout the space or on each side of a membrane.
Passive diffusion that is aided by transport proteins, but that does not require cellular energy.
Diffusion of water through a selectively permeable membrane
Describes a solution whose solute concentration is equal to the solute concentration inside a cell
Describes a solution whose solute concentration is higher than the solute concentration inside a cell. Cell shrinks.
Describes a solution whose solute concentration is lower than the solute concentration inside a cell. Cell swells.
Movement of substances through a cell membrane using energy in the form of ATP. Substances move from a low concentration to a high concentration. Includes protein pumps, endocytosis and exocytosis.
A protein in the membrane that uses energy to move things from low concentration to high concentration.
Active transport process where a cell engulfs materials with a portion of the cell's plasma membrane and releases the contents inside of the cell. Includes Phagocytosis and Pinocytosis.
Active transport process in which a vesicle inside a cell fuses with a cell membrane and releases its contents to the external environment
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