Transcript Steps in Aerobic Respiration

Steps in Aerobic Respiration

An animal eats food
containing sugar

Mitochondria
enzymes begin the
breakdown of sugar

Energy is released
from glucose in
many small steps.

Energy from glucose
is used to make a
valuable chemical
called ATP

Cells gets rid of
waste: H20 and CO2

ATP is used to
power all of the cells
activities
Steps in Lactic Acid
Fermentation



An animal cell
releases lactic acid
as a waste
An animal burns
sugar without
oxygen
Muscles get sore
(fatigue) if lactic
acid levels go up.
Energy from glucose
is used to make a
valuable chemical
called ATP
 An animal runs out
of oxygen and can
no longer do aerobic
respiration
 ATP is used to
power all of the cells
activities

Steps in Lactic Acid
Fermentation

An animal runs out
of oxygen and can
no longer do aerobic
respiration

An animal burns
sugar without
oxygen

An animal cell
releases lactic acid
as a waste
Muscles get sore
(fatigue) if lactic
acid levels go up.
 Energy from glucose
is used to make a
valuable chemical
called ATP
 ATP is used to
power all of the cells
activities

Steps in Making Dannon
Yogurt

Milk is warmed to 80
degrees so that
Lactobacillus bacteria
will multiply rapidly

A special bacterium
(Lactobacillus) is added
to milk

Yogurt is packaged so
no new bacteria can
enter; product is
refrigerated and
delivered

Milk is warmed to 140
degrees for 1 hour,
killing bacteria
(Pasteurization)

Bacteria respire without
oxygen, releasing lactic
acid, which curdles milk

Whole milk is delivered
from cow to yogurt
factory
Steps in Making Dannon
Yogurt


Whole milk is delivered
from cow to yogurt
factory
Milk is warmed to 140
degrees for 1 hour,
killing bacteria
(Pasteurization)




A special bacterium
(Lactobacillus) is added
to milk
Milk is warmed to 80
degrees so that
Lactobacillus bacteria
will multiply rapidly
Bacteria respire without
oxygen, releasing lactic
acid, which curdles milk
Yogurt is packaged so
no new bacteria can
enter; product is
refrigerated and
delivered
Steps in Alcohol Fermentation



Yeast runs out of
oxygen and can no
longer do aerobic cell
respiration
Yeast burn sugar without
oxygen
Yeast release alcohol
and CO2 waste



Energy released from
sugar is used to make a
valuable cell chemical,
ATP.
ATP is used to power all
of the cell’s activities
Yeast dies if the
alcohol level reaches
about 12%
Steps in Alcohol Fermentation



Yeast runs out of
oxygen and can no
longer do aerobic cell
respiration
Yeast burn sugar without
oxygen
Yeast release alcohol
and CO2 waste



Energy released from
sugar is used to make a
valuable cell chemical,
ATP.
ATP is used to power all
of the cell’s activities
Yeast dies if the
alcohol level reaches
about 12%
Steps in Making Beer or Wine



Water, sugar and
flavorings are added to
an open container
Yeast is added to the
container and the
container is closed
Yeast burns sugar
without oxygen

Energy released from
sugar is used to make a
valuable cell chemical,
ATP.

Yeast release alcohol
and CO2 waste

Yeast dies and is
filtered out of the
container. The
remaining liquid is
aged to improve flavor.