Aerobic Respiration

Evolutionary Importance

Structure Meets Function

Types of Energy Transfer

Homeostasis

Review of Glycolysis

• Let’s do a mastering biology as a class!!!

Evolutionary Importance

• Compare the efficiency of fermentation to aerobic respiration

• What does increased efficiency allow for?

Conversion Reaction• Pyruvate-->Acetyl CoA

• What about Acetyl CoA makes it more “reactive” than Pyruvate?

• What secondary products are made?

Mechanism

• Structure Meets Function

• 3 Steps– Conversion of

Pyruvate to Acetyl coA

– Krebs Cycle

– Electron Transport Chain

Krebs Cycle

*What is the role of each intermediary in the Krebs Cycle?

*Where does the CO2 given off in respiration come from?

*Is the Krebs cycle efficient?

*What is the important product of the Krebs Cycle?

Harnessing Free Energy from Falling Electrons

• How are electrons transported? What must be true about each protein?

• Why does this depend on oxygen concentration?

• What is oxygen’s role?

Unity and Diversity

• When comparing organisms, why do scientists often compare the DNA of cytochrome C?

Using Passive transport to produce ATP

• “proton motive force”• “chemiosmosis”• “coupling”

Role of Mitochondria in ATP production

• Inner membrane• Christae• Matrix

The Electron Transport Chain

Can you answer?

• What supplies the electrons?

• What are the electron acceptors within the membrane called?

• What is the final electron acceptor?

• How does this process produce ATP?

• What is the logic behind the term chemiosmosis?

• What happens if your muscle cells run out of oxygen?

Homeostasis

• At what points in the process is respiration controlled?

• Give an example of negative feedback. And explain.

• AMP (M=“mono”). Why might this stimulate glycolysis?

Case Study

• We can metabolize more than just glucose!• Using Figure 9-19 and the web answer the following case

study:A prisoner at Cedar Junction has decided to go on a starvation diet in protest. Explain how his body will continue to produce ATP. Make sure to include the order in which substances will be metabolized. Finally, tell how long can this go on before medical staff need to intervene and force a feeding tube?

Review

Lab Investigation

• Does temperature affect respiration rate?

You will alter the temperature of Goldfish and see how their respiratory rate is affected.

You will use a measure called Q10. For Wednesday…bring in a paper that uses Q10 and try to figure out what it is and how it is used.