Regents Biology A Slideshow Presentation © 2008 DaveCo. inc. All rights reserved.
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Transcript of Regents Biology A Slideshow Presentation © 2008 DaveCo. inc. All rights reserved.
![Page 1: Regents Biology A Slideshow Presentation © 2008 DaveCo. inc. All rights reserved.](https://reader036.fdocuments.us/reader036/viewer/2022070400/56649f135503460f94c27a26/html5/thumbnails/1.jpg)
Regents Biology A
Slideshow Presentation
© 2008 DaveCo. inc. All rights reserved.
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CellularRespiration
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Overview
Given: Cells need energy.Given: Food contains energy.
Prove: How cells get the energy out of food into a usable form.
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Overview
What kind of energy is in food?
Chemical EnergyKinetic Energy
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Overview
What kind of energy do cells use?
Chemical Energy – ATP
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Problem
Convert
Into
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Solution
Slowly break down food molecules, and convert the energy in their bonds into energy that can make ATP.
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GlycolysisKrebs Cycle
Electron Transport Chain
The Trifecta
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The Big PictureGlycolysis:
Break apart glucose
Krebs Cycle:Pluck electrons from glucose
leftovers
Electron Transport Chain:Make proton gradient
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GlycolysisP P
-1-2
Pyruvate + 2 ATP + 2
2
NADH
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Krebs Cycle
2 ATP8 NADH2 FADH2
MostlyReducedCompounds
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E.T.C.
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E.T.C.
H+
H+H+
H+ H+
H+
H+
H+
H+H+
H+H+
H+
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ATP SynthaseIntermembraneSpace
Matrix
H+
H+H+ H+
H+H+
H+
ATP!
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Why Oxygen?•Most electronegative.
•Without it, the entire system backs up like an assembly line.
•Create water at the end – an actual source of water for some creatures.
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Summary
Glycolysis:
Krebs:
ETC:
2 ATP 2 NADH
2 ATP 8 NADH 2 FADH2
34 ATP
38 ATP + H2O +CO2
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Summary
Why all the rigmarole?
Release the energy slowly tocontrol where it goes.
Still not efficient – body heatis evidence.
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Resources
Respiration Resources
Extension Resources