1. Movement Through Membranes
SPI.1.7 Predict the movement of water and other molecules across selectively permeable membranes.
SPI.1.8 Compare and contrast active and passive transport.

2. Cell Membrane Phospholipids Carbohydrate Chains Selectively Permeable
Create barrier
Carbohydrate Chains
Communication
Selectively Permeable
Picky about what gets through
Proteins
Allow molecules to pass through
Important in maintaining homeostasis!

3. Solution – homogenous mixture
Solute
Dissolved particles
Solvent
Dissolving liquid
Solution
Mixture = solute + solvent

4. Concentrations Mass Volume Concentration ÷ = Amount Solute (grams)
Amount Solvent (Liters)
Concentration
Mass per Volume (g/L) ÷ =
Which liquid has a higher concentration?

5. Facilitated Diffusion
Two Types of Transport
Passive
Types of Passive
Diffusion
Osmosis
Facilitated Diffusion
Active
Types of Active
Ion Pumps
Endocytosis
Exocytosis
Difference?
No Energy
Energy Needed

6. Movement of particles (solutes)
Diffusion
Movement of particles (solutes)
High Concentration
Low Concentration
Goal?
Equilibrium
Energy

7. Diffusion Demo + + Base Color? Color? + = Phenolphthalein Base Pink
White-Clear
Clear
Results:
The bag was:__________________
The beaker was: _______________
The plastic bag was semi permeable to _________________

8. Osmosis Water goes to the higher concentration
The movement of water across a membrane
Low solute
High solute
High water
Low water
Water goes to the higher concentration
(bigger number of solutes)

9. Water moves in & out the cell
Tonicity
Concentration difference between two solutions separated by a semi permeable membrane
Hypotonic
Hypertonic
Isotonic
Low conc. of solutes
High conc. of solutes
Equal conc. of solutes
Water moves into the cell
Water moves in & out the cell
Water moves out of the cell
Cells will swell
Cells will shrink
Cells will stay the same

10. Osmosis in Blood Cells

11. Hypotonic
Hypertonic
Isotonic

12. Move from areas of High to Low Concentrations
Movement through
protein channels
NO Energy Required!

13. Movement from areas of low to high concentration
Need energy!
Movement from areas of low to high concentration

14. Movement from areas of low to high concentration
Ion Pumps
Movement from areas of low to high concentration
Movement through
protein channels
Need Energy!

15. Membrane surrounds and brings in large particles
Endocytosis
Membrane surrounds and brings in large particles
Need Energy!

16. Exocytosis
Packaged materials from Golgi are pushed through the membrane to the outside of the cell
Need Energy!