Ch.2, sec.1&2, cell energy-photosynthesis-respiration

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Here is the Photosythesis and Respiration processes including the Fermentation process that occured inside the prokaryotic and Eukaryotic Cells to get the required energy for the cell activities!

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Ch.2, sec.1&2, cell energy-photosynthesis-respiration

  1. 1. Cell Processes and Energy:Photosynthesis & Respiration Chapter 2, Section 1
  2. 2. Objectives In plants, chloroplasts capture energy from the sun in order to make food during photosynthesis Cells release energy from food through either cellular respiration of fermentation Why it matters: Understanding how plants & animals get energy to grow & develop is an important part of biology.
  3. 3. Objectives In plants, chlorophyll (found in chloroplasts) captures energy from the sun in order to make food during photosynthesis Cells release energy from food through either cellular respiration or fermentation Why it matters: Understanding how plants & animals get energy to grow & develop is an important part of biology.
  4. 4. How Does a Plant Make It’s Own Food? Plants use carbon dioxide (CO2), water (H2O), and sun’s energy to make food. This is called “photosynthesis” The food gives plants energy Animals get the energy stored in plants when they eat them.
  5. 5. How Do Plants Get Energy From Sun? Plants have pigments that absorb energy from light Chlorophyll (found in chloroplasts) is the pigment used in photosynthesis
  6. 6. What “Food” do Plants Make? The “food” plants make is a sugar called glucose (C6H12O6). Plants are called ‘ Autotrophs’ that make its own food. Glucose and oxygen (O2) are made during photosynthesis.
  7. 7. How Do Organisms Get Energy From Food? Animals cannot make their own food like plants can and they are called ‘Heterotrophs’. But, BOTH plants and animals must break down (digest) food in order to get energy from it (so they can live, grow, & develop) Cells do this 2 ways: cellular respiration and fermentation
  8. 8. Sec.2 Cellular Respiration & Fermentation Cellular Respiration uses oxygen (O2) to break down food Fermentation does not use oxygen Cellular respiration releases more energy from food than Fermentation. So most eukaryotes (ex: plants & animals) get their energy through cellular respiration Insectivores
  9. 9. Cellular Respiration Cellular Respiration = chemical process that happens in cells In eukaryotes, it happens mostly in the mitochondria
  10. 10. Process of Cellular Respiration Food (glucose) is broken down into CO2 and H2O and energy is released C6H12O6 + 6 O2  6 CO2 + 6 H2O + energy (ATP) This energy can be used for:  Keeping a constant body temperature
  11. 11. What Do You Notice?
  12. 12. Check It Out! Did you notice that cellular respiration is just the opposite of photosynthesis ?
  13. 13. Fermentation Happens when cells cannot get the oxygen they need for cellular respiration *Alcoholic Fermentation: yeast and Fermentation is a way to get energy when oxygen one celled organisms break down isn’t available sugars. Ex: In short, fast races you might get a burning feeling in your leg muscles because of a build up of lactic acid (made during fermentation), it is called Lactic Acid Fermentation.
  14. 14. Pop Quiz1) Plants use carbon dioxide (____), water (____), and the sun’s energy to make food. 2) What type of cell has chloroplasts? 3) BOTH plants and animals must break down food in order to get ________from it. 4) How are respiration and photosynthesis related? 5) Fermentation is a way to get energy when ______ isn’t available.

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