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Understanding Cellular Respiration: Aerobic and Anaerobic Processes

Cellular respiration is a crucial process by which organisms convert food into usable energy. It occurs in all cells and has two main types: aerobic and anaerobic respiration. Aerobic respiration requires oxygen and produces a high yield of energy (36 ATP), occurring in the mitochondria. In contrast, anaerobic respiration happens without oxygen, yielding less energy (2 ATP) and leading to products like lactic acid or alcohol. This guide explores the definitions, reactants, products, and distinctions between these two processes essential for life.

kathleen-mann
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Understanding Cellular Respiration: Aerobic and Anaerobic Processes

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  1. Tuesday 12/20/10 AIM: Why do organisms perform cellular respiration? DO NOW: How does your body get the energy it needs?

  2. What is RESPIRATION?? • process by which a cell breaks down food (glucose) and changes the energy stored in food into a more usable form (ATP). **it occurs in the cells of ALL ORGANISMS ! There are 2 Types of respiration… 1. Aerobic 2. Anaerobic

  3. What is AEROBIC Respiration?? AEROBIC = with oxygen • process of breaking down glucose in the presence of oxygen to produce a lot of energy (36 ATP’s). **occurs only in the presence of OXYGEN !! Formula: Glucose + oxygen + water→ carbon dioxide + water + 36 ATP C6H12O6 + H2O +O2 CO2 + H2O + 36 ATP

  4. What are REACTANTS? • substances that go INTO a reaction. Reactants for aerobic resp : • Glucose – from food ingested. • Oxygen – from the environment • Water – from the environment

  5. What are PRODUCTS? • substances that are produced by a reaction. Products of aerobic resp: • CO2 – - waste product that is excreted into the environment. • H20 – - waste product that is excreted into the environment.

  6. ATP - high energy compound that is used to fuel cell processes. What is cellular respiration? Write down New Vocab words!

  7. Where does it occur in the cell? **it occurs in the MITOCHONDRIA of all organisms !

  8. What is ANAEROBIC RESPIRATION (orFERMENTATION)? ANAEROBIC = without oxygen • process that produces a smaller amount of energy (2 ATP’s) by breaking down glucose WITHOUT OXYGEN! ** occurs when oxygen IS NOT available! There are 2 TYPES…

  9. 1. ALCOHOL FERMENTATION • produces alcohol as an end product. Formula: Glucose → alcohol + carbon dioxide + 2ATP + heat C6H12O6 → alcohol + CO2 + 2 ATP + heat

  10. What organisms perform alcohol fermentation? • YEAST – used to make bread & cakes and alcohol (beer, wine, etc.)

  11. 2. LACTIC ACID FERMENTATION • produces lactic acid as a waste product. Formula: Glucose → lactic acid + carbon dioxide + 2ATP C6H12O6 → lactic acid + CO2 + 2 ATP

  12. What organisms perform Lactic Acid fermentation? • HUMANS – muscle cells perform it for quick, short term energy. • BACTERIA - occurs in bacteria and is important in the dairy industry for the production of cheeses and yogurt.

  13. Compare Aerobic to Anaerobic Aerobic Anaerobic • No Oxygen used • Uses Oxygen • Produces 2 ATP • Produces 36 ATP • Occurs in the • Mitochondria • Occurs in the cytoplasm • Produces Carbon • dioxide • and water • Produces Carbon dioxide • and Alcohol or • Carbon dioxide and • Lactic acid

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