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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.

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what is 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 “breathing”.
how does cellular respiration work
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
What is the Equation for Cellular Respiration?
  • C6H12O6 + O2-----> CO2 + H2O + Energy(ATP)
  • Glucose+Oxygen -----> Carbon Dioxide+Water+Energy
what is fermentation
What is Fermentation?
  • Some cells are able to obtain energy from food w/o using energy.
  • These organisms (single-celled, don’t need oxygen) obtain their energy through the process of Fermentation.
  • Fermentation does not give off as much energy as Cellular Respiration.
photosynthesis vs cellular respiration
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.