Flashcards
Biology
Flashcards do conjunto (13)
- 1HomeostasisMaintaining a balance in an organism’s environment; keeping stable conditions.
- 2The Cell membrane helps maintain homeostasis and it is a PHOSPHOLIPID BILAYER
- 3The two major components of the cell membrane are lipids and proteins
- 4EndocytosisParticles move INTO the cell
- 5ExocytosisThis causes the cell to expand (swell)
WATER moves into the cell
Example: Distilled water
- 6Hypertonic SolutionCauses a cell to shrink (shrivel) WATER leaves the cell
Example: Salt water
- 7Isotonic SolutionThe cell stays the same
- 8Passive TransportNO energy is needed
- 9Simple TransportThe movement of molecules from areas of high concentration to areas of low concentration
- 10Facilitated DiffusionMolecules move from a high concentration to a low concentration, but with help of a transport (carrier) protein
- 11OsmosisDiffusion of water
- 12Active TransportEnergy is required to move molecules from low to high. It uses transport proteins (sometimes called pumps)
Examples: sodium (NA)
Potassium (K)
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