1. Cell Review Answers

2. Cell Membrane Images
(cannot put up images due to copyright laws)

3. 1) TITLE: Diffusion
Description: movement of substances/ molecules across the membrane

4. 2) TITLE: Osmosis
Net movement of water
Description: movement of water across the cell membrane
Water molecules
Solute molecules

5. 3) TITLE: Osmosis Description: Effect on cell as osmosis occurs
Animal Cell
Plant Cell
(Pressure Decreases) (Equilibrium) (Pressure Increases)
IDEAL FOR PLANT
Description: Effect on cell as osmosis occurs

6. 4) TITLE: Facilitated Diffusion
Description: diffusion of substances across the membrane using a transport protein
Protein
Phospholipid
Bilayer
Ion /

7. 5) TITLE: Active Transport- Na+ K+ pump
Description: Active transport (ATP used) of Sodium (Na+) and Potassium (K+) across the membrane using a protein pump

8. 6) TITLE: Vesicle Transport
Phagocytosis (2) Exocytosis
“Cellular Eating”
Description:
Vesicle
pushing materials out of the cell, such as waste products
Large, solid particles engulfed

9. Diffusion and Osmosis Crossword

11. Chapter Review

12. 1. Label images below based on solution

13. 2) Movement across the cell membrane that does not require energy is called passive transport 3) The difference in the concentration of a substance across a space is called a concentration gradient 4) If there is a concentration gradient, substances will move from an area of high concentration to an area of low concentration 5) The cell membrane is selectively permeable 6) Diffusion is the simplest type of passive transport 7) Diffusion of water through a selectively permeable membrane is called osmosis

14. 8) The direction of water movement across the cell membrane depends on the concentration of solutions 9) A solution that causes a cell to swell is called a hypotonic solution 10) Organelles that collect excess water inside the cell and force water out are called contractile vacuoles 11) The process of taking material into the cell by infolding the cell membrane is called endocytosis 12) In facilitated diffusion, membrane proteins help molecules across the membrane

15. 13) In diffusion, molecules spread out 14) The lipid bilayer describes the cell membrane 15) Facilitated diffusion moves substances down their concentration gradient without using the cell’s energy

16. Study Guide Know parts of a solution
Solute: material being dissolved (salt, sugar)
Solvent: material that is dissolving (water)

17. Label a cell membrane (bilayer, proteins)

18. Explain what will happen to cells when placed in solutions
Isotonic
Hypotonic
Hypertonic
Cell is in equilibrium
Cell will swell
Cell will shrink

19. 4. Know the definition of: (definitions are simplified)
Diffusion - movement of substances from areas of high concentration to low
Equilibrium - when molecules are spread out evenly
Osmosis - diffusion of water
Isotonic - concentration of solution is equal to that of the cell
Hypertonic - concentration of solution is greater to that of the cell, water leaves cell, cell shrinks
Hypotonic -concentration of solution is less than that of the cell, water enters cell, cell swells
Facilitated diffusion - diffusion of substances across the membrane using a transport protein
Endocytosis - cell takes in large particles by engulfing them in its membrane
Phagocytosis - large solid particles engulfed
Pinocytosis -liquid engulfed
Exocytosis - pushing materials out of the cell, such as waste products