Download Respiration - Mayfield City Schools

What is it?
Respiration
• What are two types of
fermentation?
Alcoholic fermentation
Lactic acid fermentation
Alcoholic Fermentation
Pyruvic acid + NADH --> alcohol + CO2 +NAD+
What process produces the
NADH?
Is this process aerobic or
anaerobic?
Lactic Acid Fermentation
Pyruvic acid + NADH --> lactic acid + NAD+
Where do the
pyruvates come
from?
Does this
fermentation
produce CO2?
Where is the NAD+
going to be
reused?
• Lactic acid is produced
in your muscles during
rapid exercise when
the body cannot supply
enough oxygen.
QuickTime™ and a
decompressor
are needed to see this picture.
• You produce lactic acid
during short intense
work like sprinting
because you can not
supply oxygen fast
enough to the muscle
cells.
Aerobic respiration
What is the correct sequence of events in this process?
Glycolysis --> Krebs cycle --> Electron transport chain
C6H12O6 + 6O2 -->
6CO2 + 6H20 + ENERGY
What are the reactants in cellular respiration?
food (glucose) and oxygen
Some of the energy released is captured as ATP
and some is lost as heat.
How many ATP’s are recovered from one glucose
molecule?
36
What are the products of respiration?
carbon dioxide and water and energy
Glycolysis
1) Where does it occur?
cytoplasm
2) What is the starting molecule?
glucose
3) What is needed to get the process
started?
an energy input = 2 ATP’s
Glycolysis
• What happens if oxygen is not present
during glycolysis?
the pyruvates will be consumed by
fermentation
Electron carriers?
• NADH
• FADH2
• During what processes are these compounds
produced?
NADH - during glycolysis and Krebs cycle
FADH2 - during Krebs cycle
Aerobic vs Anaerobic
What does aerobic mean?
process that requires oxygen
Does glycolysis require oxygen?
no
Does the Krebs cycle require oxygen?
yes
Krebs Cycle
• What product from gylcolysis begins the
Krebs cycle?
Pyruvic acid
• Where does this cycle take place in the
cell?
mitochondria
Krebs cycle
• What does the Krebs cycle produce?
NADH, FADH2, CO2,
and some ATP
• Which of these products are important
to the electron transport chain?
NADH, FADH2, these are the electron
carriers that allow for the production of
much more ATP
Electron Transport Chain
Electron Transport Chain
• How do the electrons get transported to the
special proteins involved?
carried by carrier molecules NADH, FADH2
• What is the primary function of the chain?
to make ATP
Electron Transport Chain
• Oxygen and water --- how is oxygen used in
cellular respiration?
The oxygen atoms are the final electron
acceptors and then they can attach with two
H+ ions to form water at the end of the
transport chain
Which process does not
release energy from glucose?
Glycolysis
Fermentation
Photosynthesis
cellular respiration
How are cellular respiration
and photosynthesis almost
opposite processes?
• Oxygen
photosynthesis produces it
respiration uses it to break down food
• Carbon dioxide
respiration produces it
photosynthesis uses it to make glucose
How are cellular respiration
and photosynthesis almost
opposite processes?
• Glucose
photosynthesis manufactures it
respiration breaks it down to produce ATP
• Water
photosynthesis uses it to produce sugars
respiration produces it as a waste product
while making ATP