Bellwork 12/2/13 – Happy December!
Y.O.P.
1. What is fermentation?
2. What are the end products of photosynthesis?
3. Why is cellular respiration important?
4. How might cellular respiration and photosynthesis
be related?
Bellwork 12/3/13 - YOP
Reflect on the virtual lab from yesterday.
 Why is elodea important to have in a healthy
ecosystem?
 How would the removal of snails impact the elodea?
Bellwork 12/5/13 - YOP
A.
End product is lactic acid or alcohol
B.
Process that yields 2 ATP and is an
aerobic process
C.
End product is two pyruvate molecules
D.
Process all living organisms undergo,
energy is released
5. Aerobic
E.
Yields the bulk of the ATP in cellular
respiration
6. Inner membrane of Mitochondria
F.
Location of fermentation and glycolysis
7. Cellular Respiration
G. Requires oxygen
8. Cytoplasm
H.
Location of Kreb’s Cycle
I.
Does not require oxygen
J.
Location of the electron transport chain
1. Kreb’s Cycle
2. Glycolysis
3. Electron Transport Chain
4. Fermentation
9. Anerobic
10. Matrix of Mitochondria
Cellular Respiration
 The process by which living things release energy
stored in organic molecules.
 Two Major Stages:
1. Glycolysis
2. Oxidative Respiration or Fermentation
ATP
Glycolysis
 The Splitting of glucose into 2 three-carbon molecules
called pyruvate
 Occurs in the cytoplasm
 NAD is reduced to NADH
 CO2 is released
 2 ATP are produced
 DOES NOT REQUIRE OXYGEN
Glycolysis
 http://highered.mcgrawhill.com/sites/0072507470/student_view0/chapter25/ani
mation__how_glycolysis_works.html
Anaerobic vs Aerobic
 Anaerobic = Without Oxygen
 Fermentation
 Process by which pyruvate is converted into either
alcohol and CO2 or lactic acid
 Occurs in the cytoplasm
 H from NADH is attached to pyruvate
 Only 2 ATP are produced
Anaerobic vs Aerobic
 Aerobic = With Oxygen
 Oxidative Respiration is the process by which pyruvate
is broken down to form MOST of the energy which is
supplied to plants and animals
 Occurs in the mitochondria
 Occurs in two major phases
1. Krebs Cycle
2. Electron Transport Chain
Krebs Cycle
 Occurs in the matrix of the mitochondria
 2 ATP are produced
Electron Transport Chain
 Occurs in the membrane of the mitochondria
 32 ATP are produced
Aerobic Respiration
 Each Cell uses between 1-2 billion ATP/min.
 How many ATP’s are used each minute by all 100
trillion cells in the body?
 1 glucose = 686 Cal
 1 ATP = 7 Cal
 How efficient is aerobic respiration?
 How does the efficiency of your cells compare to the
efficiency of an automobile that are only 25% efficient
in converting chemical energy into mechanical energy?
Muscle Contraction
 Glycolysis =2 ATP
 Lactic Acid Fermentation =2 ATP
 Aerobic Respiration=34 ATP
 Creatine Phosphate (5x more than ATP)
(donates Phosphate to ADP  ATP)
 Exercise Requirements: 10 min. taps glycogen for glucose
 10-30 min. Cells use either glucose or fatty acids
 Beyond 30 min.  fatty acids are primary source
Oxygen Debt
 The amount of oxygen necessary to convert lactic acid to glycogen
 Oxygen  lactic acid  pyruvate  ATP or glucose  glycogen
 No Oxygen = lactic acid build up
Muscle Fatigue
 Inability of muscle to contract
 Results from a deficit of ATP and/or accumulation od
lactic acid
 http://www.youtube.com/watch?v=rGaP9nE8d9k