1. DO NOW- quick answers! What is the function of the cytoplasm?
Name 2 organelles found only in plants:
What process happens in the mitochondria?
Amino acids are the building blocks of….
What type of biological molecule are all enzymes?
What are the building blocks of carbohydrates?
What numbers on the pH scale are basic?
What can starch be broken down into?
What is the job of the cell membrane?

2. Diffusion, Osmosis, and Active Transport
Science Practice- Day 3
Coach Taylor & Coach Feil

3. Passive Transport
Movement across the membrane that does NOT require energy

4. Diffusion
The movement of substances from a high concentration to a low concentration

5. Diffusion
The movement of substances from a high concentration to a low concentration
Moving from where there is more of something to where there is less of something

7. Diffusion
The movement of substances from a high concentration to a low concentration
Moving from where there is more of something to where there is less of something
Molecules will move across the membrane until the concentration is equal on both sides of the membrane
Molecules will diffuse until they are in equilibrium

10. I I I I I I I I

11. Osmosis The diffusion of water
Water flowing from a high concentration to a low concentration

12. Osmosis The diffusion of water
Water flowing from a high concentration to a low concentration
NO ENERGY REQUIRED

13. Onion (plant) Cells:
When an onion cell is placed in a salt water solution, water will leave the cell.
The cell membrane will shrink as water leaves the cytoplasm
THE CELL WALL WILL STAY THE SAME

15. CELL WALL
CELL MEMBRANE
CYTOPLASM

16. SALT WATER

18. CELL WALL
CYTOPLASM
CELL MEMBRANE

19. DISTILLED WATER
(100% H2O, Fresh Water, Pure Water)

21. Active Transport
Movement from a LOW concentration to a HIGH concentration
From where there is LESS to where there is MORE
ATP is required!!!!
“Against the concentration gradient”

23. Cell Membrane
The cell membrane is the organelle that controls what enters and leaves the cell
“Selectively Permeable”
Permeable- Able to pass through

24. Permeable- small molecules, C6H12O6, H2O, O2, CO2
NOT permeable- big molecules, STARCH