Types of Passive Transport - Diffusion and Osmosis

1. Topic: Cell Processes Aim: Describe the two types of passive transport. Do Now: You have 2 minutes to copy the topic, aim and homework. The do now activity is on the next slide. HW: Venn Diagram of diffusion and osmosis (on loose-leaf).

2. Exit Card…5 minutes Compare and contrast passive and active transport by completing one of the following. Write a paragraph of at least 4 sentences comparing and contrasting passive and active transport. Be sure to use the following terms: particles, energy, high concentration, low concentration. OR Compare and contrast passive and active transport by drawing diagrams of each type. Be sure to label the particles, high concentration, low concentration, energy. Draw an arrow showing the movement of the particles. http://www.online-stopwatch.com/

3. Identify the 2 types of passive transport.

4. DIFFUSION LOW • Identify the high and low concentration. • Identify the type of transport the diagram represents. • When will this process stop? HIGH

5. Diffusion • Movement of particles from a HIGH to LOWconcentration • NO ENERGY • Ex: CO2, O2, glucose, sucrose, H2O, etc…

6. The animation above is showing the movement of glucose molecules across a membrane. Describe what is happening in this process.

7. Explain why this diagram represents diffusion.

8. HIGH LOW • The diagram represents water molecules moving. • Identify the high and low concentration. • Describe how the water molecules will move. • Identify the type of passive transport occurring. Support your answer.

9. Osmosis Cell membrane Outside cell Inside cell High conc. of water molecules. Low conc. of water molecules.

10. Osmosis Cell membrane OSMOSIS Outside cell Inside cell High conc. of water molecules. Low conc. of water molecules.

11. Movement of WATERmolecules through a membrane from a HIGH toLOWconcentration • NO ENERGY

13. https://www.youtube.com/watch?v=XXVc7HXjRp8

14. What happens when a cell is placed in a salt solution? 33% H2O • H2O ALWAYS diffuses OUTof the cell 72% H2O

15. Normal red blood cell and normal plant cell Red blood cell and plant cell surrounded by salt solution

16. What happens when a cell is placed in a distilled water? • Water ALWAYS diffusesINTOthe cell 100% H2O 72% H2O

17. Normal red blood cell and normal plant cell Red blood cell and plant cell in distilled water

18. What happens when a cell is placed in a solution with the same water concentration? 72% H2O • Cell remains the same 72% H2O

20. Identify the type of transport occurring when the molecules move from area A to area B. Support your answer 2. Identify the type of transport occurring when the molecules move from area B to area A. Support your answer. Passive transport Molecules are moving from a HIGH to LOW concentration. Active transport Molecules are moving from a LOW to HIGH concentration.

21. 3. Identify the type of passive transport occurring if WATER molecules move from area A to area B. Support your answer. 4. Identify the type of passive transport occurring if glucose molecules move from area A to area B. Support your answer. Osmosis WATER is moving from a HIGH to LOW concentration. Diffusion GLUCOSE is moving from a HIGH to LOW concentration.

22. The movement of materials from higher to lower concentration is called  • diffusion  2. active transport  • pinocytosis • phagocytosis

23. Which process requires cellular energy? • diffusion 2. passive transport 3. active transport 4. osmosis

24. The movement of water from higher to lower concentration is called  • pinocytosis  2. active transport  • osmosis • phagocytosis

25. Damage to which structure will most directly disrupt water balance within a single-celled organism? • ribosome 2. cell membrane 3. nucleus 4. chloroplast

26. Sodium ions are pumped from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of • diffusion 2. osmosis 3. passive transport 4. active transport

27. The movement of materials from lower to higher concentration requiring energy in the form of ATP is called  • movement 2. diffusion  • active transport 4. cell division

28. The movement of glucose molecules from a high to low concentration is known as   • locomotion 2. diffusion  • active transport 4. osmosis

29. Exit Card… Compare and contrast diffusion and osmosis by completing one of the following. Write a paragraph of at least 4 sentences comparing and contrasting diffusion. Be sure to use the following terms: particles, energy, high concentration, low concentration. OR Compare and contrast diffusion and osmosis by drawing diagrams of each type. Be sure to label the particles or water, high concentration, low concentration. Draw an arrow showing the movement of particles or water.

31. COMPARE Passive and active transport both involve the movement of substances. CONTRAST Passive transport does not require energy while active transport does require energy. During passive transport substances move from a high to low concentration. During active transport substances move from a low to high concentration.