Osmosis
The movement of water across a semipermeable membrane. Water will move from an area of LOW solutes concentration to an area of HIGHER solute concentration.
Osmotic pressure
The force with which water moves across a membrane due to a concentration gradient.
The amount of solute in the environment surrounding a cell can have a profound effect on the growth of a cell.
Hypertonic
Net movement of water out of the cell.
Environment contains a high solute concentration, relative to the interior of the cell.
Plasmolysis
The loss of water from the cell will cause the cytoplasm to shrink away from the cell wall.
The loss of water will inhibit the growth of the cell because many cell’s metabolic reaction requires water.
Halphiles
Salt loving, bacteria can grow in high salt concentration
Hypotonic
Net movement of water into the cell.
Surrounding environment has a low solute concentration.
Isotonic
water will move in and out of the cell equally.
Solute concentration is same inside and outside the cell.
Gradient Plate
Is a double-layered agar plate with a concentration gradient in the upper layer of agar.
Which Organism grew best in a high NaCl Concentration
Staphylococcus aureus
Which organism grew best in a high Sucrose concentration?
Saccharomyces cerevisiae
