Cell Membrane
What allows water to enter the cell?
Diffusion
What does Isotonic mean?
Same strength
What will a dry mount show?
It will show just the cells of the onion.
What is Exocytosis?
It is when particle leave the cell.
What is the cell membrane made out of?
Phospholipids
What does hypertonic mean?
Above strength
What will a wet mount show?
It will show the cells expanding due to the environment being hypotonic.
What is Endocytosis?
It is when particles enter the cell.
What is Osmosis?
The diffusion of water through a selectively permeable membrane.
What does hypotonic mean?
Below strength
What will a salt water wet mount show?
It will show the cells starting to shrivel due to the environment being hypertonic.
What are protein pumps?
It is a way to transfer molecules into and out of a cell.
What is aquaporin?
Water channels in the cell membrane.
What is diffusion?
The driving force behind then movement of many substances across the cell membrane.
What does an isotonic environment do to a cell?
It has water enter and leave the cell at the same rate.
What is Pinocytosis?
Ingestion of a liquid into a cell (Cell Drinking)
What is osmotic pressure?
The net movement of water in and out of a cell
What is facilitated diffusion?
Molecules that cannot directly diffuse across the membrane pass through special protein channels
What is turgor pressure?
Pressure exerted by fluid in a cell that presses the cell membrane against the cell wall.
What is Phagocytosis?
Ingestion of a solid into a cell (Cell Eating)