Download AnaerobicAerobic CellResp

With a partner… discuss and jot down answers...
Why does dough rise?
Aerobic Respiration
vs
Anaerobic Respiration
What do these have in common?
We have been learning about
aerobic respiration.
Oxygen is involved.
C6H12O6 + 6O2 → 6CO2 + 6H2O + 38ATP
But… what if there is
NO oxygen?
O2
2 Types of Cellular Respiration
1. Aerobic Respiration = uses oxygen to produce ATP
2. Anaerobic Respiration = no oxygen; makes less ATP;
produces lactic acid or alcohol
➢ Also known as
fermentation
Aerobic vs. Anaerobic
• Aerobic respiration has 3
steps
Glucose
• If there is no oxygen, steps
2 and 3 are skipped
(1) Glycolysis
•Fermentation
occurs
•Still produces
ATP, but not as
much (2)
•Lactic acid or
alcohol are
byproducts
(2) Kreb’s
Cycle
(3) Electron
Transport
Chain
No
O2
Fermentation
Lactic
Acid
Alcohol
Anaerobic Fermentation
Occurs when O2 NOT present - Nets only 2 ATP
2 TYPES
• Called Lactic Acid fermentation in muscle cells
Glucose → Lactic Acid + ATP
• Called Alcoholic fermentation in yeast
(produces ethanol)
Glucose → Ethanol + CO2 + ATP
Alcoholic Fermentation
Occurs with yeast.
Involved in the production of alcoholic
beverages and bread.
Glucose → Ethanol + CO2 + ATP
So,
why does dough rise?
Lactic Acid Fermentation
Occurs with various bacteria:
-Involved in the production of pickles, yogurt,
and various other foods
Also occurs in animal muscle cells
-Provides ATP when there is a lack of oxygen
(instead of aerobic cellular respiration)
-Can be responsible for muscle
burning/soreness during exercise
Glucose → Lactic Acid + ATP
When does anaerobic respiration occur in animals?
During heavy exercise.
Why does it occur?
Muscles resort to anaerobic respiration when
Enough oxygen is not delivered to them fast enough.
(Aerobic respiration is just not cutting it.)
For instance, sprinting = requires lots of energy (and therefore,
oxygen!) in a short amount of time
If you sprint somewhere, you will stop and
start panting.
- Explain why you do this, making a
connection to anaerobic respiration.
During intense exercise…
Aerobic respiration is not able to give enough energy fast
enough
- so, anaerobic respiration gives a small amount of extra
energy.
Lactic acid is formed as byproduct in the process, building
up slowly in the muscles.
Muscles are in an oxygen debt – body must make up for it.
THINK – PAIR - SHARE
1.
This type of anaerobic respiration is very important
to the beer and wine industry.
2.
This type of anaerobic respiration can cause muscle
burning during exercise.
THINK – PAIR - SHARE
1. Which type of cellular respiration produces more
ATP?
2. What is another term for anaerobic respiration?
Man with issue of yeast in his stomach
https://www.youtube.com/watch?v=gdSHWMQT2X8
Why pickles and certain things are good for us
https://www.youtube.com/watch?v=1vwfGxVWYNk
How is this experiment similar to what we do as humans?