Anaerobic respiration is respiration using electron acceptors other than molecular oxygen (O2). Although oxygen is not the final electron acceptor, the process still uses a respiratory electron transport chain.
13. Lactic acid fermentation
Lactic acid fermentation – anaerobic respiration in which Pyruvic
acid is converted to lactic acid. Occurs in animal cells.
14. Production of lactic acid
In Muscles
• During strenuous exercise, the breathing rate
and heartbeat will be increased so that oxygen
can be brought faster to muscles
• There is a limit to rate of breathing and
heartbeat
• Extra energy for strenuous exercise is thus
produced by anaerobic respiration in muscles
17. –Builds up in cells and lowers pH (acidic)
–Causes muscle crams and soreness after
working out
–Must be removed from the cells and
broken down in the liver; 20% changed
to CO2 and H2O
–Oxygen debt O2 needed to remove
lactate
18.
19. RESPIRATORY QUOTIENT
• The respiratory quotient (RQ) is the ratio of
CO2 produced to O2 consumed while food is
being metabolized:
RQ = CO2 eliminated/O2consumed.
When carbohydrates are used as substrate and are completely
oxidised, the RQ will be 1,
21. • This quotient is useful because the
volumes of CO2 and O2 produced
depends on which fuel source is being
metabolized
• Measuring RQ is a convenient way to
gain information about the source of
energy an animal is using.
• We can then compare the metabolism of
animals under different environmental
conditions by simply comparing RQ.
22. Photosynthetic quotient
The volume of oxygen released in photosynthesis as a proportion
of the volume of carbon dioxide used in that process.