Diffusion of water across a semipermeable membrane
Movement of particles from a higher concentration to a lower concentration
Concentration of solutes OUTSIDE of a cell is HIGHER than the concentration of solutes inside (cell shrinks)
Concentration of solutes INSIDE the cell is HIGHER than the concentration of solutes outside. (cell explodes)
The concentration of solutes inside and outside of the cell is the SAME. (equilibrium / stable)
HIGH to LOW concentration, with the concentration gradient, no ATP (energy) needed
LOW to HIGH concentration, against the concentration gradient, requires ATP (energy)
Water loving, like the phosphate head in a phospholipid
Water fearing, like the lipid tail in a phospholipid
Movement of materials out of the cell - exit (active transport)
Movement of material into the cell - enter (active transport)
Adenosine Triphosphate, 1adenine and 3 phosphates
Adenosine Diphosphate, formed when ATP loses an end phosphate group
Functions of ATP
Energy for movement of muscle cells, energy for movement of cilia and flagella, active transport, and the breakdown of large molecules
Allows only certain molecules to pass through it
The use of carrier proteins for diffusion or protein channels (coin machine)
The process where molecules, food, and other substances are moved across the membrane
Double layer of proteins (phospholipids) that controls what goes in and out of cell; selectively permeable
Stable internal enviornment
difference in concentration of a substance on two sides of a membrane
substance being dissolved
A membrane bound sac that contains materials involved in transport of the cell.
cell eating solid particles
cell drinking particles dissolved in water
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