Download Cellular Respiration

Learning Targets
• Explain how cellular respiration converts
stored chemical energy in food molecules
to energy used by the organism to
maintain life.
•
• Distinguish key differences between
aerobic and anaerobic respiration in the
use of oxygen and energy production.
Cellular Respiration

Respiration
• Respiration – the
biochemical process that
makes ATP from
glucose
• Occurs in both
autotrophs and
heterotrophs.
AND

Respiration
• There are two types of respiration,
AEROBIC and ANAEROBIC.
• Aerobic respiration requires OXYGEN to
release energy.
• The chemical equation for aerobic
respiration is:
C6H1206 + 6O2
Glucose
Oxygen
 6H2O + 6CO2 + 36 ATP
Water
Carbon Dioxide
Energy

Respiration
• Anaerobic respiration DOES NOT
REQUIRE OXYGEN. (Also called
FERMENTATION)
• Both aerobic and anaerobic respiration
begin with the same process, glycolysis.

Glycolysis
• Occurs in CYTOPLASM
• Means “split the sugar,”

Glycolysis
2
Glucose
Glycolysis
Mitochondria
• Double membrane
– outer membrane
– inner membrane
• highly folded cristae
• enzymes & transport proteins

Aerobic Respiration
•
Occurs in the MITOCHONDRIA
•
•
Krebs Cycle: Occurs in Mitochondrial
Matrix. Produces large quantity of
electron carriers that will be used in the
electron transport chain to power it.
Electron Transport Chain: Occurs in
cristae (folded inner membrane) of
mitochondria. Produces water and 36
ATP.

Aerobic Respiration
Electron Transport Chain:

Aerobic Respiration
• The end product of aerobic respiration is
the production of 36 ATP MOLECULES
and WATER.

Aerobic Respiration
Glucose
Glucose
2
36
Glycolysis
Glycolysis
Krebs
cycle
Electron
transport

Anaerobic Respiration
• Occurs in the CYTOPLASM.
• Occurs in the absence of oxygen

Anaerobic Respiration
• Lactic acid Fermentation- Lactic acid and CO2
are produced.
– Lactic acid can build up in muscles when they run out
of oxygen and causes muscle soreness
• Alcoholic fermentation- Ethanol and CO2 are
produced.
– Process used to make wine, beer, cheese, and bread
• Both processes result in the production of only 2
ATP MOLECULES.

Factors Affecting Respiration:
• ATP concentration - the more ATP
molecules available, the slower the rate of
respiration.

Anaerobic Respiration
2
36
Glucose
Glycolysis
Krebs
cycle
Fermentation
(without oxygen)
Electron
transport
Alcohol or
lactic acid