1. Cell Boundaries and Movement

2. I can explain cellular processes like homeostasis, and cell transport.

3. Cell Barriers Cell membranes
Structure: contain a flexible lipid bilayer with imbedded protein molecules and carbohydrate molecules
Function: Substances move across the cell membrane through
A.) lipid bilayer
B.) protein channels
C.) assistance of protein
molecules
D.) Processes of endocytosis
and exocytosis

4. Cell Barriers Cell Walls
Structure: made mostly of tough carbohydrate fiber called cellulose
Function: Cell walls support and protect cells; cell walls are porous and allows substances to move through easily

5. Homeostasis Cell barriers help cells maintain maintain homeostasis
Homeostasis is the process by which organisms maintain a relatively stable internal environment.

6. Types of Movement Through Cells
A.) Diffusion B.) Osmosis C.) Facilitated Diffusion D.) Active Transport

7. Diffusion
Substances move across the cell membrane from areas of high solute concentration to areas of low solute concentration until equilibrium is reached
No energy required
Substances continue to move back and forth across the membrane once equilibrium is reached

8. Osmosis The diffusion of water across a cell membrane
Types of osmotic solutions
Hypotonic
Isotonic
Hypertonic

9. Concentration
Concentration of a solution is the mass of solute in a given volume of solution, or mass/volume A Solute is a substance that is dissolved in a solvent to make a solution

10. Which way will the water move?

12. On page 19 Write the definition of diffusion, osmosis and homeostasis
Glue the diagrams given to you. Label them Osmosis and Diffusion
Write the following questions and answers.
In the lungs, the movement of carbon dioxide out of cells and oxygen into cells can best be explained by which of the following processes?
a.) active transport b.) diffusion
c.) endocytosis d.) osmosis
Suzy is going on a date with Billy and she wants to smell pretty, so she sprays on perfume in the bathroom and fragrance starts to fil up the entire house. This would be an example of what type of process?
a.) osmosis b.) diffusion
c.) phagocytosis d.) pinocytosis