Osmotic Pressure Flashcards
What is osmosis?
The movement of water across a semipermeable membrane from a high concentration to a low concentration
What is tonicity?
Concentration of impermeable solutes
What is an isotonic environment?
The concentration outside of the cell is equal to the inside of the cell
Water moves in and out of the cell equally
What is the result of an isotonic environment?
No change
What is a hypertonic environment?
Concentration outside of the cell is greater than inside of the cell
Water moves out of the cell
What is the result of a hypertonic environment?
Plasmolysis
What is a hypotonic environment?
Concentration outside of the cell is less than the inside of the cell
Water moves into the cell
What is the result of a hypotonic environment?
Swelling or lysis
How can osmosis be utilized?
Hypotonic environments= plasmolysis
This means no water in the cell for metabolism so it stops growing
What are examples of how osmosis helps?
Salting fish/meats, honey, jellies, and condensed milk
What are facultative halophiles?
More common, can grow on 2-15% sodium chloride
What are obligate halophiles?
Can grow in extreme salt conditions
