Cellular Respiration
Aerobic &
Anaerobic
Respiration
Cellular Respiration
metabolic pathway that
uses glucose to produce
adenosine triphosphate
(ATP)
What is Cellular
respiration?
Respiration is a chemical reaction within
living cells which releases energy from
glucose. Aerobic respiration requires oxygen,
whilst anaerobic respiration does not.
What is aerobic
respiration?
Mitochondria
Aerobic respiration is when oxygen
is used to break down glucose.
Glucose is oxidized to release its
energy. The first stages of
respiration occur in the cytoplasm
in cells but the main site for
respiration is in the mitochondria.
Aerobic respiration equation
glucose + oxygen carbon dioxide + water + energy released
What is anaerobic
respiration?
Most organisms require oxygen to respire and
live, however some organisms can continue to
respire when oxygen runs out. This is
anaerobic respiration. Humans can do this for
a short time, resulting in lactic acid building
up in our muscles. Some fungi and plants
respire anaerobically to release less energy
but stay alive.
Anaerobic respiration equations
In muscles In yeast
glucose lactic acid + ethanol + carbon
glucose
energy dioxide + energy
Aerobic respiration Anaerobic respiration
Releases a relatively large amount Releases a small amount of
of energy. (36-38 ATP) energy very quickly. (2 ATP)
Oxygen is absent or not very
Oxygen is present.
abundant.
Glucose is not completely oxidized and
Glucose is completely oxidized.
the products still contain energy.
Aerobic respiration Anaerobic respiration
GLUCOSE + OXYGEN PYRUVIC ACID + NADH
GLYCOLYSIS, KREBS CYCLE, ELECTRON ALCOHOLIC AND LACTIC ACID
TRANSPORT CHAIN FERMENTATION
PRODUCES ATP & CO2 & H20 PRODUCES LACTIC ACID OR ALCOHOL
SIMILARITIES
Both uses
Both Both processes
glucose as the
processes happens inside
starting
produce ATP the cell
molecule
