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Why do we eat?

Explore the importance of adenosine triphosphate (ATP) as the energy storage molecule in animal and plant cells, and how it powers cellular processes. Learn about the conversion from ATP to adenosine diphosphate (ADP) and the significance of phosphate bonds in releasing energy. Discover the ATP cycle and the abundance of ATP in cells. Engage in creating your own ATP foldable to enhance learning.

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Why do we eat?

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  1. Why do we eat? Human are heterotrophs Hetero- other, different trophe — Nourishment, food Plants are autotrophs Auto-self Trophe- nourishment, food

  2. We eat because we need energy! • Energy is produced in the mitochondria

  3. Animal and Plant cells

  4. Energy storage molecule • ATP: Adenosine Triphosphate • 1 adenine • 1 ribose • 3 phosphates

  5. ATP: adenosine triphosphate • What does tri mean?

  6. Energy storage molecule ADP: adenosine diphosphate What does di mean?

  7. Changing from ATP to ADP What is the process called where H2O breaks apart a larger molecule into a smaller parts?

  8. Phosphate bonds • Bonds connecting phosphate get broken • Energy is released

  9. Release of energy

  10. Compare: ATP and ADP

  11. Energy difference • ATP: High energy • Fully charged battery • ADP: Low energy • Battery on low power • What do you do with you phone when the battery is running out?

  12. ATP Cycle

  13. How much ATP is in one cell? • each cell contains about one billion ATP molecules • amount is sufficient for only a few minutes: rapidly recycled

  14. Energy in Cells Human body has ~50-100 trillion cells

  15. Total ATP in the human body (on average) • Given a hundred trillion cells in the average male, about 1023 or 1 sextillion ATP molecules normally exist in the body. • 1,000,000,000,000,000,000,000 • For each ATP “the terminal phosphate is added and removed 3 times each minute” http://www.trueorigin.org/atp.asp

  16. ATP Foldable • This is an individual assignment- • Each person will create an ATP foldable. Examples from previous biology students are at the front for you to view.

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