Cellular respiration chapter 7
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CELLULAR RESPIRATION Chapter 7. ORGANELLE OF FOCUS. OVERALL EQUATION. C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O + energy(ATP) Glucose + Oxygen  Carbon Dioxide + Water + ATP Adenosine triphosphate. VOCABULARY. Autotrophs

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CELLULAR RESPIRATION Chapter 7

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Cellular respiration chapter 7

CELLULAR RESPIRATIONChapter 7


Organelle of focus

ORGANELLE OF FOCUS


Overall equation

OVERALL EQUATION

C6H12O6 + 6O2 6CO2 + 6H2O + energy(ATP)

Glucose + Oxygen  Carbon Dioxide + Water + ATP

Adenosine triphosphate


Vocabulary

VOCABULARY

  • Autotrophs

  • Organisms that are able to produce their own chemical energy (food), ex. plants

  • Heterotrophs

    • Organisms that obtain their chemical energy from other sources, by eating ex. animals

  • Cellular Respiration

    • Breaking down organic molecules to produce energy

  • Aerobic Respiration

    • Oxygen present for pathway of breaking down food

  • Anaerobic Respiration

    • No Oxygen present - causes an alternative pathway


Focus on aerobic pathway for cellular respiration

Focus on Aerobic Pathway for Cellular Respiration

  • STEPS

    • 1. Glycolysis – splits the glucose in half (6C to 3C), occurs in cytoplasm of cell

    • 2. Pyruvic acid conversion – loss of CO2 produces a product ready for the next step, occurs in mitochondria

    • 3. Kreb Cycle – breaks down the remaining carbons from what’s left of the glucose molecule, produces high energy products NADH and FADH2, , occurs in matrix of mitochondria


Steps continued

Steps continued

-4. Electron Transport Chain – a series of proteins along the inner membrane of mitochondria that pass e-

* OXYGEN is the final acceptor of electrons

* H+ build up powers ATP synthase (sound familiar)


Glycolysis http instruct1 cit cornell edu courses biomi290 asm glycolysis dcr

Glycolysishttp://instruct1.cit.cornell.edu/courses/biomi290/ASM/glycolysis.dcr


Pyruvic acid conversion

Pyruvic Acid Conversion

Why twice?


Kreb cycle http www2 nl edu jste aerobic respiration htm

Kreb Cyclehttp://www2.nl.edu/jste/aerobic_respiration.htm

Where does CO2 go?

Where do NADH and FADH2 go?


Cellular respiration chapter 7

Electron Transport Chain (ETC)http://highered.mcgraw-hill.com/sites/0072437316/student_view0/chapter9/animations.html#


Summary chart

Summary Chart


What happens if no oxygen is present

WHAT HAPPENS IF NO OXYGEN IS PRESENT??

Can’t do Electron Transport Chain so…

no use doing Kreb cycle. Why not?

  • NADH and FADH2 have nowhere to go if ETC not running.


Anaerobic pathways

ANAEROBIC PATHWAYS

  • Alcohol Fermentation – organism produce alcohol from pyruvic acid ex. Yeast cells

  • Lactic Acid Fermentation – muscle cells not receiving enough oxygen so they produce lactic acid from pyruvic acid


Alcohol fermentation

Alcohol Fermentation

How many ATP?

2


Lactic acid fermentation

Lactic Acid Fermentation

How many ATP?

2


Pros and cons of lactic acid fermentation

Pros and Cons of Lactic Acid Fermentation

  • Pros – your muscle will keep working even without sufficient oxygen


Cellular respiration chapter 7

  • Cons – you feel it, lactic acid causes sore muscles and cramping

  • Your body will get rid of lactic acid – it diffuses into blood and goes to liver where it is converted back to pyruvic acid – ready for O2

LIVER


Recap c 6 h 12 o 6 6o 2 6co 2 6h 2 o energy atp

RECAPC6H12O6 + 6O2 6CO2 + 6H2O + energy (ATP)

  • GLUCOSE becomes…

    • CO2

  • Oxygen is needed…

    • to accept the electrons at the end of ETC

  • CO2 goes…

    • into blood, lungs, exhaled

  • Water is produced when…

    • O2 collects enough e- and H+ to become water

  • ATP is produced…

    • in glycolysis, Kreb Cycle and mainly in ETC due to chemiosmosis


  • Cellular respiration chapter 7

    • Pyruvic acid is made …

      • at the end of glycolysis (3C)

  • NADH and FADH2 carry …

    • Electrons and H+ to the ETC

  • Protons (H+) build up in the …due to…

    • Intermembrane space, ETC pushing them out

  • ATP synthase allows H+ to … and …

    • Back into the matrix, produces ATPs

  • If no oxygen, yeast produce…

    • ethanol

  • If no oxygen, muscle cells produce…

    • Lactic acid


  • Cellular respiration chapter 7

    • The ETC produces...

      • 34 ATPs

  • In aerobic respiration, Pyruvic acid is converted to…

    • Acetyl CoA

  • The molecule that must be recycled in the Kreb cycle is…

    • Oxaloacetic acid

  • The break down of one glucose gives…

    • 38 total ATP


  • Cellular respiration chapter 7

    • Autotrophs…

      • Make their own food/chemical energy

  • Heterotrophs…

    • Must eat other things to obtain chemical energy

  • Aerobic respiration requires…

    • Oxygen


  • Eat and breathe it good for you

    EAT AND BREATHE: IT’ GOOD FOR YOU!


    The other half of the story photosynthesis

    The other half of the story=PHOTOSYNTHESIS


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