B.4B
What is osmosis?
The movement of water from high to low concentration.
What is simple diffusion?
LIKE OSMOSIS! Move with the flow. MOLECULES move from HIGH CONCENTRATION to LOW CONCENTRATION.
What is a hypertonic solution?
The cell shrinks and wrinkles due to solution having a higher solute conc.
What is Facilitated Diffusion (Passive)?
Same as simple diffusion except now we need help to move larger molecules like glucose through protein channels using TRANSPORT PROTEINS.
What is an isotonic solution?
The cell remains a normal size due to solution being equal in conc to the cell.
What is active transport?
Molecules go against the flow, from low concentration to high, Requires ATP (Adenosine Triphosphate). Energizes transport protein (usually pumps). Moving AGAINST the concentration gradient!!!
What is a hypotonic solution?
The cell swells up and bursts due to solution having a lower solute conc.
What is endocytosis?
Ingestion of bacteria or other materials.
What is homeostasis?
The stable, optimal conditions within an organism.
What is exocytosis?
Molecules exit (EXO) used to get rid of cell waste or deliver materials that cells make like polysaccharides.