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Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
Power Point 5.1: Cell Energy (Photosynthesis & Respiration)
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Power Point 5.1: Cell Energy (Photosynthesis & Respiration)

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  • 1. Cell Energy: Photosynthesis & Respiration Chapter 5, Section 1
  • 2. Today’s Learning Goals <ul><li>In plants, chlorophyll (found in chloroplasts) captures energy from the sun in order to make food during photosynthesis </li></ul><ul><li>Cells release energy from food through either cellular respiration or fermentation </li></ul><ul><li>Why it matters: Understanding how plants & animals get energy to grow & develop is an important part of biology. </li></ul>
  • 3. How Does a Plant Make It’s Own Food? <ul><li>Plants use carbon dioxide ( CO 2 ), water ( H 2 O ), and sun’s energy to make food. </li></ul><ul><li>This is called “ photosynthesis ” </li></ul><ul><li>The food gives plants energy </li></ul><ul><li>Animals get the energy stored in plants when they eat them. </li></ul>
  • 4. How Do Plants Get Energy From Sun? <ul><li>Plants have pigments that absorb energy from light </li></ul><ul><li>Chlorophyll (found in chloroplasts) is the pigment used in photosynthesis </li></ul>
  • 5. What “Food” do Plants Make? <ul><li>The “food” plants make is a sugar called glucose (C 6 H 12 O 6 ). </li></ul><ul><li>Glucose and oxygen (O 2 ) are made during photosynthesis. </li></ul>
  • 6. How Do Organisms Get Energy From Food? <ul><li>Animals cannot make their own food like plants can. </li></ul><ul><li>But, BOTH plants and animals must break down (digest) food in order to get energy from it (so they can live, grow, & develop) </li></ul><ul><li>Cells do this 2 ways: cellular respiration and fermentation </li></ul>
  • 7. Cellular Respiration & Fermentation <ul><li>Cellular Respiration uses oxygen (O 2 ) to break down food </li></ul><ul><li>Fermentation does not use oxygen </li></ul><ul><li>Cellular respiration releases more energy from food than Fermentation. </li></ul><ul><li>So most eukaryotes (ex: plants & animals) get their energy through cellular respiration </li></ul>
  • 8. Cellular Respiration <ul><li>Cellular Respiration = chemical process that happens in cells </li></ul><ul><li>In prokaryotes, it happens in the cell membranes </li></ul><ul><li>In eukaryotes, it happens mostly in the mitochondria </li></ul>
  • 9. Process of Cellular Respiration <ul><li>Food (glucose) is broken down into CO 2 and H 2 O and energy is released </li></ul><ul><li>C 6 H 12 O 6 + 6 O 2  6 CO 2 + 6 H 2 O + energy (ATP) </li></ul><ul><li>This energy can be used for: </li></ul><ul><ul><li>Keeping a constant body temperature </li></ul></ul><ul><ul><li>Storage (ATP) - to be used later for things like growth </li></ul></ul>
  • 10. What Do You Notice?
  • 11. Check It Out! <ul><li>Did you notice that cellular respiration is just the opposite of photosynthesis? </li></ul>
  • 12. Fermentation <ul><li>Happens when cells cannot get the oxygen they need for cellular respiration </li></ul><ul><li>Fermentation is a way to get energy when oxygen isn’t available </li></ul><ul><li>Ex: In short, fast races you might get a burning feeling in you leg muscles because of a build up of lactic acid (made during fermentation) </li></ul>
  • 13. Pop Quiz <ul><li>1) Plants use carbon dioxide (____), water (____), and the sun’s energy to make food. </li></ul><ul><li> CO 2 and H 2 O </li></ul><ul><li>2) What type of cell has chloroplasts? </li></ul><ul><li>PLANT CELL </li></ul><ul><li>3) BOTH plants and animals must break down food in order to get ________from it. </li></ul><ul><li>ENERGY </li></ul><ul><li>4) How are respiration and photosynthesis related? </li></ul><ul><li>THEY ARE THE REVERSE (OPPOSITE) OF EACH OTHER. </li></ul><ul><li>5) Fermentation is a way to get energy when ______ isn’t available. </li></ul><ul><ul><li>OXYGEN </li></ul></ul>
  • 14. Today’s Learning Goals <ul><li>In plants, chloroplasts capture energy from the sun in order to make food during photosynthesis </li></ul><ul><li>Cells release energy from food through either cellular respiration of fermentation </li></ul><ul><li>Why it matters: Understanding how plants & animals get energy to grow & develop is an important part of biology. </li></ul>

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