Ppt-Cell-Transport.pptx HIGH SCHOOL GRADE TWELVE TWELVE GRADE

This powerpoint tackles the cell transport, function, how cell transport to different parts of our body. Learn how substances move across the cell membrane by passive or active transport, and how osmosis affects cell volume and function. Moving things in and out of the cell is an important role of the plasma membrane. It controls everything that enters and leaves the cell. occurs when substances cross the plasma membrane without any input of energy from the cell. No energy is needed because the substances are moving from an area where they have a higher concentration to an area where they have a lower concentration. Water solutions are very important in biology. When water is mixed with other molecules this mixture is called a solution. Water is the solvent and the dissolved substance is the solute. A solution is characterized by the solute. For example, water and sugar would be characterized as a sugar solution. More the particles of a solute in a given volume, the higher the concentration. The particles of solute always move from an area where it is more concentrated to an area where it is less concentrated. It’s a little like a ball rolling down a hill. It goes by itself without any input of extra energy.

1. Did you know that ……… The principle of osmosis has a wide variety of application in our everyday life. Our old folks would usually advise us to gargle with salt-water solution to relieve us from sore throat or to soak our foul-smelling feet with salt-alum ( tawas )-water solution to eradicate the foul odor. The solutions used would have greater solute concentration than inside the bacterial cells that cause the sore throat or stinking feet. Thus, water from the bacterial cells are drawn out, plasmolyzing and killing the bacterial cells.

2. 1. Which of the following statements is a function of a cell membrane? A. The cell membrane keeps the cell wall in place. B. The cell membrane stores water, salts, proteins and carbohydrates. C. the cell membrane breaks down lipids, carbohydrates, and proteins from foods. The cell membrane regulates the movement of materials into and out of the cell.

3. 2. The cell membrane consists primarily of a thin layer of amphipathic phospholipids “water-loving” region. Which term means “water-loving”? A. hydrophilic B. hydrophobic C. Nonpolar D. tail

4. 3. What do you call the movement of water across a membrane? A. diffusion B. endocytosis C. exocytosis D. osmosis

5. 4. Which of the following processes moves molecules using cellular energy? A. diffusion Facilitated diffusion Osmosis pinocytosis

6. 5. When an animal cell put in a hypotonic environment, what would happen? A. an animal cell will swell B. an animal cell will shrink C. An animal cell will secrete enzymes D. an animal cell will remain unchanged

7. 6. Which of the following statements describes selective permeability A. The ability of the cell membrane to ALLOW some things to pass through while preventing other things from passing through. B. The movement of molecules from an area of concentration to an area of low concentration. C. The movement of materials across the cell membrane that requires no energy from the cell. D. The movement of materials through (or across) the cell membrane .

8. 7. When cells take in food particles through active transport, what is it called? A. exocytosis B. osmosis C. phagocytosis D. pinocytosis

9. 8. When cells form a vesicle to take in materials, which form of transport is occurring? A. ENDOCYTOSIS B. exocytosis Facilitated diffusion osmosis

10. 9. Which of the following statements shows the difference between active and passive transport? A. active transport uses hormones and passive transport does not. B. Active transport stores transport proteins and passive transport releases. C. Active transport uses ATP as energy and passive transport does not require energy D. Active transport does not need energy and passive transport uses ATP as energy.

11. 10. An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes? A. water to move into the cell B. water to move out of the cell. C. solutes to move into the cell. D. solutes to move out of the cell.

12. 11. In Which solution will water move into and out of the cell at the same rate? A. hypertonic B. hypotonic Isotonic plasmolysis

13. 12. Which of the following transport processes moves the molecules against a concentration gradient? A. active transport B. Diffusion C. facilitated diffusion D. osmosis

14. 13. During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will______ A. stop moving across the membrane B. move across the membrane to the inside of the cell C. move across the membrane to the outside of the cell. D. continue to move across the membrane in both directions.

15. 14. Due to higher concentration of oxygen in the air than your blood, oxygen goes from the lungs into the red blood cells by______ A. Active transport B. diffusion C. osmosis D. facilitated Diffusion

16. 15. What type of cell transport is Illustrated below?

17. A. diffusion B. endocytosis and exocytosis C. facilitated diffusion osmosis

18. Complete the table by checking THE correct column for EACH STATEMENT Statement IsotoniC HYPOTOnIc hypertOniC CAuSES CELL TO SHRINK Does Not change THE SHAPE of the cell causeS a cell To swELL NORMaL CELl caUSES A PlaNT TO BE FLacciD PlaNt CELl BEcOmES TURGiD Cell tends To SHRIVEL caUses The Cell TO BE PLAsmOlYzed

19. ACTIVITY: DIFFUSION Procedures: 1. Fill one glass cup with hot water. Fill the second glass with cold water. 2. Put 1-2 drops of red food coloring in the hot cup and 1-2 drops of blue food coloring in the cold one. 3. Watch and wait for color to disperse entirely. Observe. 4. what would you observed? which one dispersed quickly? What would be the reason?

20. ACTIVITY: DIFFUSION 5. Get two containers. One is wide and the other one is narrow. 6. fill both container with the same temperature of water. 7. Put one drop of food coloring in each container and compare their rate of diffusion. 8. Observe. Which container demonstrated slower rate of diffusion? Explain.

21. Activity: Osmosis Procedures: 1. you will be observing potato strips submerged to distilled water with different concentration of salt. 2. Cut 6 potato strips 4cm in length. Measure 150ml of distilled water and pour it to the 3 beakers or containers. 3. Weigh 20g and 5g of salt and put it in the first and second beaker. Add 2 potato strips in the 3 beakers. 4. Observe. Record the weight and size of potato strips in grams after 6 hours.

22. ACTIVITY: OSMOSIS Initial length(cm) Actual length (cm) Average length (cm) Initial weight (g) Actual weight (g) Average weight (g) Beaker 1 (distilled water) 4cm 4cm Beaker 2 (distilled water with 5g salt) 4cm 4cm Beaker 3 (distilled water with 20g salt) 4cm 4cm

23. Guide Questions: 1. Observe what happen to the potato strips in the 3 setups, in terms of weight and size. 2. If there any changes happen to the potato strips, what would be the reason? Explain. 3. Give your conclusion about the activity.