Honors Biology Arizona College Prep
Mrs. Glassmeyer Textbook Reference: 4.10-4.14, The Living
World 7th edition
Lab: Diffusion & Osmosis
Unit Learning Goal: Student will be able to compare structure & analyze transport of materials into and out of prokaryotic & eukaryotic cells by accurately explaining the role of proteins & ATP.
Lab Learning Goal(s):
1. To investigate diffusion through student selected experimental setups.
2. To investigate osmosis through student selected experimental setups.
3. To predict the movement of water in experimental setups.
Learning Goals
Review: Solution & Cell Basics
Which part is which?
Solute
Solvent
How about….
Cytoplasm
Extracellular fluid
What are the Osmotic Concentrations?
Hypertonic – higher solute concentration and lower water concentration
Hypotonic – lower solute concentration and higher water concentration
Isotonic – equal solute concentration
Osmosis in Plant Cells
Onion Cells in Hypotonic Solution Onion Cells in Hypertonic Solution
How to do an Osmosis Problem?
Let’s observe a problem being solved.
Write out the steps for solving a problem in your own words.
Let’s apply to four sample problems.
Sample Problems
Provided in class.
Osmotic Situations
Let’s create and fill out a table for reference
Extracellular Fluid (Solution) Concentration
Cytoplasm (Cell) Concentration
Water Moves? Cell Does What?
Hypertonic
Hypotonic
Isotonic
Osmotic Situations
Check your chart
Now, what does this actually look like?
Extracellular Fluid (Solution) Concentration
Cytoplasm (Cell) Concentration
Water Moves? Cell Does What?
Hypertonic Hypotonic Out of the cell Shrinks
Hypotonic Hypertonic Into the cell Swells
Isotonic Isotonic Both directions No change