day 4

5. occurs when a cell produces substances for export, such as a protein, or when the cell is getting rid of a waste product or a toxin
7. the membrane found in all cells that separates the interior of the cell from the outside environment
9. a two-layered arrangement of phosphate and lipid molecules that form a cell membrane
10. being a solution that is unable to absorb or dissolve any more of a solute at a given temperature and pressure
12. a process by which cells absorb external material by engulfing it with the cell membrane

1. a term derived from the Greek “hydro”, meaning water, and “phobos”, meaning fear
2. Refers to substances that absorb water
3. the process of moving molecules across a cellular membrane through the use of cellular energy.
4. Movement of solute molecules from lower concentration to a higher concentration of solution through a semipermeable membrane
6. the ability of a substance to allow gases or liquids to go through it
8. a sweet colorless syrupy alcohol usually obtained from fats and oils
11. when substances cross the plasma membrane without any input of energy from the cell
13. a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration