general knowledge
barrier that surrounds the cell and allows only only certain things into and out of the cell
cell membrane
a property of cell membranes that allows only certain things to cross but not others
semi permeable
proteins present in the cell membrane that allow different types of substances to pass through the membrane
transport proteins or protein channels
having equal solute concentrations inside and outside the cell
isotonic
the movement of water molecules across a semi permeable membrane
osmosis
attracted to water or able to be dissolved in water. "water loving"
Hydrophillic
process such as endocytosis and exocytosis
active transport
the movement of molecules from an area of higher concentration to an area of lower concentration
diffusion
dissolved particles in a solution
solute
how does active transport moves particles? Which way?
lower to higher
repelled by water or not able to be dissolved in water
hydrophobic
way of describing the structure and function of the cell membrane
fluid mosaic model
diffusion of molecules across a membrane through special proteins in the membrane. Takes no energy
facilitated diffusion
the pressure created by osmosis as water enters into a plant cell
turgor pressure
process used by a cell to take in a large particle
endocytosis
having a partial positive electrical charge on one end and a partial negative electrical charge on the other end
polar
the two layers of phospholipid molecules arranged tail to tail that help to make up cell membranes
phospholipid bilayer
concentration gradient
having a higher solute concentration in the solution outside the cell than inside the cell causing the cell to shrink
hypertonic
process used by a cell to release materials out of the cell
exocytosis
comes from the greek word meaning "the same" and "steady". The process of keeping the internal conditions of an organism stable
homeostasis
cellular transport that does not require energy
passive transport
the state of having equal concentrations as molecules move into and out of a cell at the same rate
dynamic equilibrium
having a lower solute concentration in the solution outside the cell causing the cell to swell
hypotonic
3 types of endocytosis
pinocytosis, phagocytosis, and receptor mediated endocytosis