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Cellular Respiration


Cellular Respiration What is Cellular Respiration? Respiration is the process by which cells obtain energy from glucose. Cells break down simple food molecules (sugar ... – PowerPoint PPT presentation

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Title: Cellular Respiration

Cellular Respiration
What is Cellular Respiration?
  • Respiration is the process by which cells obtain
    energy from glucose.
  • Cells break down simple food molecules (sugar)
    and release the energy they contain.
  • Cellular Respiration is very different than the
    life process called Respiration, which

Two Types Of Cellular Respiration
  • Anaerobic does NOT require Oxygen
  • Takes place in the cytoplasm of cells
  • Not very efficient, glucose only partially broken
  • Makes only 4 ATP
  • Examples Alcohol Fermentation and Lactic Acid
  • Takes place in certain anaerobic bacteria

Two Types Of Cellular Respiration
  • Aerobic Respiration
  • Takes place in the Mitochondria of cells
  • Efficient, glucose is completely broken down
  • Makes 36 ATP
  • Takes place 24/7 in most organisms

How Does Cellular Respiration Work?
  • CR takes place in 2 stages.
  • The first stage takes place in the cytoplasm, and
    molecules of glucose are broken down
    (anaerobic-no oxygen used).
  • The second stage occurs in the Mitochondria, and
    there, small molecules are broken down into even
    smaller molecules (aerobic- needs oxygen).
  • Energy is released at both stages.

What is the Equation for Cellular Respiration?
  • C6H12O6 O2-----gt CO2 H2O Energy(ATP)
  • GlucoseOxygen -----gt Carbon DioxideWaterEnergy

What is Fermentation?
  • Some cells are able to obtain energy from food
    w/o using energy.
  • These organisms (single-celled, dont need
    oxygen) obtain their energy through the process
    of Fermentation.
  • Fermentation does not give off as much energy as
    Cellular Respiration.

Equation for Anaerobic Cellular Respiration
  • Glucose ? Alcohol Carbon Dioxide ATP
  • Glucose ? Lactic Acid ATP
  • Only 4 ATP are produced during anaerobic

Uses for Anaerobic Cellular Respiration
  • Found in muscle cells during high intensity
    exercises (Lactic Acid)
  • Used to make alcohol (beer, wine, whiskey),
    bread, yogurt and pickles
  • Used during digestion in animals

Photosynthesis vs. Cellular Respiration
  • Both involve the same chemical compounds, but are
    the reverse processes.
  • CR produces CO2, while Photosynthesis uses up CO2
    in the atmosphere.
  • CR uses O2, but Photosynthesis produces it.
  • Photosynthesis requires energy from the sun,
    Cellular respiration gets energy from breaking
    down the chemical bonds in sugar molecules.

Photosynthesis vs. Cellular Respiration
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