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Friday Jan 26

Friday Jan 26. Cellular respiration Use a model to illustrate that cellular respiration is a chemical process whereby the bonds of food molecules and oxygen molecules are broken and the bonds in new compounds are formed resulting in a net transfer of energy. Today ’ s agenda : Warm up

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Friday Jan 26

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  1. Friday Jan 26 Cellular respirationUse a model to illustrate that cellular respiration is a chemical process whereby the bonds of food molecules and oxygen molecules are broken and the bonds in new compounds are formed resulting in a net transfer of energy • Today’s agenda: • Warm up • CER correction • Mini-lecture (cellular respiration)

  2. Warm up • What is the purpose of photosynthesis • What are the reactants (go in) • What are the products (come out) • Where does photosynthesis occur

  3. Why do leaves change color in the fall? • Claim • Evidence • Reasoning

  4. Why do leaves change color in the fall? • Claim: leaves change color in the fall because the pigment that gives them the green color (chlorophyll) is destroyed due to the cooler and shorter days (less amount of light)

  5. Why do leaves change color in the fall? • Evidence: • The leaves of trees and plants contain three main pigments • In fall, days are shorter and less light hits the plant • In fall auxin, a pigment that allows the leaves to access water • When chlorophyll is destroyed leaves do not look green anymore

  6. Why do leaves change color in the fall? Reasoning: Plants look green because they absorb all colors and reflect green. Pigments are the molecules in chloroplasts that absorb light and give leaves specific colors. For example, chlorophyll confers leaves their green color. However, when the season changes, days are shorter and less light hits the plants. In fall, auxin, that usually allows cells to get nutrients and water, is not produced. As a consequence, chlorophyll is destroyed and other pigments are taking over giving leaves different colors (orange and green).

  7. As you watch the video clip pay close attention to the captions https://www.youtube.com/watch?v=UHjZuH_3gbc

  8. Run in place as fast as you can for 1 minute. Could you keep up this pace for a much longer time? Why or why not?

  9. How do we convert the food we consume into usable energy?

  10. Presence vs. absence of oxygen Glucose Glycolysis NO OXYGEN + OXYGEN ANAEROBIC RESPIRATION Aerobic respiration Alcoholic fermentation Lactic acid fermentation

  11. Presence vs. absence of oxygen Glucose Glycolysis NO OXYGEN + OXYGEN ANAEROBIC RESPIRATION Aerobic respiration Alcoholic fermentation Lactic acid fermentation

  12. Cellular respiration What is happening in this picture? IN your notebook write what you see

  13. Cellular Respiration: the process by which the energy of glucose (sugar) is converted into ATP What do we need energy for?

  14. Cellular Respiration: is the process by which the energy of glucose (sugar) is converted into ATP What do we need energy for?

  15. Cellular respiration takes place in the mitochondria

  16. Cellular Respiration

  17. Presence vs. absence of oxygen Glucose Glycolysis NO OXYGEN + OXYGEN ANAEROBICRESPIRATION Aerobic respiration Alcoholic fermentation Lactic acid fermentation

  18. Tuesday Jan 30 Cellular respirationUse a model to illustrate the process of cellular respiration • Today’s agenda: • Warm up • Mini-lecture • Cellular respiration review

  19. Warm up • What is the goal of photosynthesis? • What is the goal of cellular respiration? • What is glycolysis?

  20. Presence vs. absence of oxygen Glucose Glycolysis NO OXYGEN + OXYGEN ANAEROBICRESPIRATION Aerobic respiration Alcoholic fermentation Lactic acid fermentation

  21. Cellular Respiration • Cells use oxygen and glucose to make energy, water and carbon dioxide • C6H12O6 + 6 O2 6 CO2 + 6 H2O + ATP

  22. Steps of Cellular Respiration • 1. Cells need energy • 2. To get energy cells break down carbohydrates /starches (polymers) into glucose (monomers) : GLYCOLYSIS

  23. Glycolysis • 1) Food is broken down into smaller molecules such as glucose. • 2) Glucose is broken down and makes ATP • Glycolysis takes place in presence or absence of oxygen

  24. GLUC ( C6H OSE 12O6)

  25. GLUC ( C6H OSE 12O6)

  26. ENERGY GLUC ( C6H OSE 12O6)

  27. Steps of Cellular Respiration • 3. When the chemical bonds of molecules are broken down energy in the form of ATP (adenosine Triphosphate) is released. • 4. In presence of oxygen, the cell is able to make a lot of energy (38 ATP molecules) • 5. Cells use this energy to function. • 6. Happens in the mitochondria

  28. Cellular respiration review sheet

  29. Summary https://www.youtube.com/watch?v=lujMVlEBnjM

  30. Comparing photosynthesis and cellular respiration

  31. Comparing photosynthesis and cellular respiration https://www.youtube.com/watch?v=DfDSqDze32E

  32. Check for understanding Which statement best describes the primary purpose of photosynthesis? • It makes sunlight for plants to use 2. It creates glucose which plants later use for energy 3. It creates oxygen so humans can survive 4. It creates carbon dioxide so other trees can survive.

  33. Check for understanding • The monomers of which of the following carbon based molecules are usually used to make energy in the body. • Carbohydrates • Fatty acids 3. Proteins 4. both a and b

  34. Check for understanding Which of the following statements regarding photosynthesis and cellular respiration is true? 1. Photosynthesis happens only in producers and cellular respiration happens only in consumers 2. Photosynthesis happens only in producers but cellular respiration occurs in producers and consumers 3. Cellular respiration occurs only in producers but photosynthesis occurs in producers and consumers 4. Photosynthesis happens in producers and consumers but cell respiration only occurs in consumers.

  35. Check for understanding What are the reactants of Cellular respiration? (Mark all that apply) • Carbon Dioxide • Oxygen 3. Water 4. Glucose

  36. Check for understanding What are the products of Cellular respiration? (mark all that apply) • Carbon Dioxide 2. Oxygen 3. Water 4. Glucose 5. ATP

  37. Mind map Oxygen, circulatory system, carbon dioxide, diffusion, plants, consumers, foods, ATP, eukaryotic cells, energy, cells.

  38. Exit ticket a. Which process is used to make glucose and oxygen b. Which process do consumers do c. Which process do producers do d. Which process makes carbon dioxide e. Which process creates energy for a cell f. In which organelle does photosynthesis occur g. In which organelle does cell respiration occur

  39. Think critically • What happens if there is no Oxygen available?

  40. https://www.youtube.com/watch?v=FSJLQ-GtJM4

  41. Cell resp and photosynthesis wheel

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