2. A. It is larger because sugar entered the cell by diffusion. B. It is larger because water entered the cell by osmosis. C. It is smaller because sugar left the cell by diffusion. D. It is smaller because water left the cell by osmosis.

3.  What is Diffusion?  What is Facilitated Diffusion?  What is Osmosis?

5. 1. Active Transport a)Protein Pumps b)Exocytosis c)Endocyctosis 1.Phagocytosis- “Cell Eating.” 2.Pinocytosis- “Cell Drinking.” Membrane Assisted Transport

6.  Active Transport cell does use energy 1. Protein Pumps 2. Endocytosis 3. Exocytos  Passive Transport cell doesn’t use energy 1. Diffusion 2. Facilitated Diffusion 3. Osmosis high low This is gonna be hard work!! high low Weeee!! !

7. cell uses energy. actively moves molecules to where they are needed. Movement from an area of low concentration to an area of high concentration. (Low  High) Three Types: 1. Protein Pumps 2. Endocytosis 3. Exocytosis

8. 1. Protein Pumps - transport proteins that require energy to do work because molecules are being moved AGAINST the concentration gradient – from low concentration areas to high concentratin areas. LOW HIGH Example: Sodium / Potassium Pumps which are important in nerve responses. Sodium Potassium Pumps Sodium Potassium Pumps (Active Transport using proteins) Protein changes shape to move molecules: this requires energy!

10.  2. Endocytosis: taking bulky material into a cell. Uses energy. Cell membrane in-folds around food particle. Phagocytosis- takes in large particles ”Cell Eating.” Pinocytosis- takes in small particles “Cell Drinking” forms food vacuole & digests food. This is how white blood cells eat bacteria!

11. 3. Exocytosis: Forces material out of cell in bulk. membrane surrounding the material fuses with cell membrane. Cell changes shape – requires energy. EX: Hormones or wastes released from cell. Endocytosis & Exocytosis Endocytosis & Exocytosis animations

12.  Molecules move from areas of low concentration to areas of high concentration through the process of A. osmosis. B. diffusion. C. passive transport. D. active transport.