ATP provides energy for cellular work

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ATP provides energy for cellular work

• Concept 7.3

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How ATP packs energy

• ATP adenosine triphosphate
• ADP adenosine diphosphate

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ATP and cellular work

• Three main types of work
• Chemical
• Ex building proteins
• Mechanical
• Ex. contraction of a muscle
• Transport
• Ex. pumping solutes across a cell membrane

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The ATP cycle

• Recyclable
• Use energy from organic molecules
• Pace
• Muscle cells recycle all of the ATP once per
  minute
• Equals to 10 million ATP molecules spent and
  regenerated per second

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Electrons fall from food to oxygen during
cellular respiration

• Concept 7.4

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Relationship b/t Cellular respiration and
breathing

• Aerobic
• Requires oxygen

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Equation for cellular respiration
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Falling Electrons

• Oxygen attracts electrons very strongly
• electron grabber

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Electron Transport Chains

• Electron carriers pass the electrons on to other
  carriers in a series of transfers
• Cellular respiration more controlled fall of
  electrons
• Releases in small amounts

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What Carries the Electrons?

• NAD (nicotinadenine dinucleotide) acts as the
  energy carrier
• NAD is a coenzyme
• Its Reduced to NADH when it picks up two
  electrons and one hydrogen ion

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Are There Any Other Electron Carriers?

• YES! Another Coenzyme!
• FAD (Flavin adenine dinucleotide)
• Reduced to FADH2