1. Cell Movement and Energy
Tuesday, March 14, 2017

2. Moving Cell Material
Diffusion – Movement of a substance from an area of high concentration to low concentration
Osmosis – diffusion of water only through a membrane
Facilitated diffusion – molecules pass through a cell membrane using a transport protein (no energy)
Active transport – movement of substance through membrane using energy

4. Endocytosis – cell takes in a substance by surrounding it with the cell membrane
Exocytosis - process in which a cell’s vesicles release their contents outside the cell.

5. Identifying Processes
Name the process involved in moving molecules across the cell membrane in each of the following cases. Write the following words down on a scratch piece of paper LARGELY: Endocytosis Exocytosis Osmosis Diffusion Active Transport Facilitated Diffusion

6. Fresh water moves into a single-celled organism.
Inside cell = 94% water
Outside cell = 100% water

7. Pockets of the cell membrane fill with water and pinch off to become vacuoles inside the cell

8. Oxygen molecules (O2) move from the lungs into the bloodstream.
100 units of O2
40 units of O2

9. An amoeba engulfs a large particle of food

10. Carrier proteins transport glucose into a muscle cell

11. Sodium ions (Na+) are pumped out of a red blood cell
19 units of Na+ inside of cell
155 units Na+ outside of cell