effects of osmosis on life osmosis- diffusion of water through a selectively permeable membrane. ...
DESCRIPTION
Isotonic Solution Isotonic: The concentration of solutes in the external solution is equal to the concentration of solutes inside the cell. Result: Water moves equally in both directions and the cell remains same size! (Dynamic Equilibrium) Osmosis Animations for isotonic, hypertonic, and hypotonic solutionsOsmosisTRANSCRIPT
Effects of Osmosis on Life Osmosis- diffusion of water
through a selectively permeable membrane.
There are 3 types of solutions:IsotonicHypertonicHypotonic
Isotonic Solution Solutions that contain the same
concentration of solutes as the cytoplasm are called isotonic (or normal saline) solutions.
There is no net movement of water either into or out of the cell.
Cells maintain their normal shape.
WATCH VIDEO OF BLOOD IN AN ISOTONIC SOLUTION
Isotonic Solution
Isotonic: The concentration of solutes in the external solution is equal to the concentration of solutes inside the cell.
Result: Water moves equally in both directions and the cell remains same size! (Dynamic Equilibrium)
• Osmosis Animations for
isotonic, hypertonic, and
hypotonic solutions
Hypertonic Solution A hypertonic solution is a solution that
contains more (hyper) solutes than the cytoplasm of the cell.
Has less water than the cell and water moves out of the cell. The cells shrink.
WATCH VIDEO OF NORMAL RBCs SUBJECTED TO A HYPERTONIC SOLUTION
Hypertonic Solution
Hypertonic: The solution has a higher concentration of solutes and a lower concentration of water than inside the cell. (High solute; Low water)
Result: Water moves from inside the cell into the solution: Cell shrinks (Plasmolysis/crenation)!
• Osmosis Animations for
isotonic, hypertonic, and
hypotonic solutions
shrinks
Hypotonic Solution A hypotonic solution contains
less solute (thus, more water) than the cytoplasm of the cells.
The water will move into the cells resulting in the swelling and lysis of the cells.
WATCH VIDEO OF CRENATED RBCs SUBJECTED TO A HYPOTONIC SOLUTION
Hypotonic Solution
Hypotonic: The solution has a lower concentration of solutes and a higher concentration of water than inside the cell. (Low solute; High water)
Result: Water moves from the solution to inside the cell): Cell Swells and bursts open (cytolysis)!
• Osmosis Animations for
isotonic, hypertonic, and
hypotonic solutions
Let’s take a closer look!
http://www.coolschool.ca/lor/BI12/unit4/U04L06/rbc.html
What type of solution are these cells in?
A CB
Hypertonic Isotonic Hypotonic