Download Cellular Respiration

Cellular Respiration
1. Chemical Pathways
A. What is Cellular Respiration?
Is O2 required?
What is the equation for cellular respiration?
What are the 3 major sets of reactions? (See
fig. 9-2)
B. What is Fermentation?
Is O2 required?
What are the 2 major sets of reactions? (See
fig. 9-4)
II. Anaerobic Respiration/Fermentation
A. Glycolysis – Fig. 9-3
Where does this process take place?
What are the products of glycolysis?
What is ATP?
What is NADH?
B. Fermentation
What are the two types of fermentation?
1.
2.
Are any ATP molecules produced in
fermentation reactions?
***For each molecule of glucose only 2 ATP are
produced during anerobic respiration.***
III. Aerobic Respiration
A. Glycolysis – exact same steps as in
anaerobic resp.; takes place in the
cytoplasm; Approx. 90% of energy is still
being stored in pyruvic acid molecules
B. What is the Krebs cycle (citric acid cycle)?
Where does this process take place?
1. How many molecules of ATP are
produced?
2. How many molecules of NADH are
produced?
3. How many molecules of FADH2 are
produced?
4. What gas is produced and how many?
C. Electron Transport Chain – uses the high
energy electrons from glycolysis and the
Krebs cycle to synthesize ATP from ADP
and Pi;
1. What two molecules donate electrons?
2. How are H+ transported across the inner
mitochondrial membrane?
How many ATP molecules are
produced?
4. What molecules is the final electron
acceptor?
***For each molecules of glucose 36 ATP are
produced during aerobic resp.
***Much more energy efficient than anaerobic
resp.
IV. Energy & Exercise
A. The body uses ATP from 3 basic sources;
ATP stored in muscle cells, and ATP
produced by aerobic & anaerobic resp.
B. The ATP stored in muscle cells only lasts
for the first few seconds of activity.
C. ATP produced by anaerobic resp. is used up
in about 90 sec.
What is O2 debt?
D. Aerobic resp. produces the ATP to sustain
activities that go on longer. That is why
athletes must pace themselves.