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Understanding Cell Theory and Energy Processes: Photosynthesis, Respiration, and Fermentation

This lesson explores the fundamental aspects of cell theory and the energy processes that allow cells to function. The cell theory comprises three key components: all living things are made of cells, cells are the basic unit of life, and all cells arise from pre-existing cells. We will delve into photosynthesis, the process by which plants convert sunlight into food, and compare it with cellular respiration, where glucose is broken down for energy. Additionally, we will discuss fermentation, a crucial process for energy production in low-oxygen conditions.

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Understanding Cell Theory and Energy Processes: Photosynthesis, Respiration, and Fermentation

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Presentation Transcript

  1. Warm-up: Dec. 6, 2010 Explain the three parts of the cell theory in your own words.

  2. Activator: Cells in Action

  3. Cells Cellular Respiration, Photosynthesis, and Fermentation

  4. Eq - Why do we need to know about cells? TWL Today I will learn about respiration and photosynthesis because I need to understand how cells are able to sustain themselves.

  5. Chapter 4 Objectives • Describe Photosynthesis and cellular respiration. • Compare cellular respiration with fermentation.

  6. Photosynthesis The process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to make food.

  7. Photosynthesis • Plant cells have molecules that absorb light energy. • These molecules are called pigments. • Chlorophyll, the main pigment used in photosynthesis, gives plants their green color.

  8. Cell Energy Chapter 4 6CO2 + 6H2O + light energy  C6H12O6 + 6O2 Photosynthesis

  9. Cell Energy • Cellular Respiration: • During cellular respiration, food (such as glucose) is broken down into carbon dioxide and water, and energy is released.

  10. Cellular Respiration • Connection Between Photosynthesis and Respiration • During photosynthesis, cells take in carbon dioxide and release oxygen. During cellular respiration, cells use oxygen to break down glucose and release energy and carbon dioxide.

  11. Fermentation • When muscles can’t get the oxygen for cellular respiration, they use fermentation to get energy. Fermentation is the breakdown of food without the use of oxygen.

  12. Check For Understanding: • Plants and animals capture their energy from the sun. • Cellular Respiration describes how a cell breathes. • Fermentation in animals produces ATP and lactic acid.

  13. Closing: • .

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