B9 - Respiration Flashcards
aerobic respiration =
glucose + oxygen —-> carbon dioxide + water (lots of energy released)
what happens in every mitochondria
glucose molecules are broken down and steadily catalysed by enzymes
why does exhaled air contain more CO2 than inhaled air
CO2 is a product of aerobic respiration
colour of limewater when CO2 is present
cloudy white
changes to the body during a marathon run
- raised heartbeat
- flushed skin
- anaerobic respiration
- fat burned
define aerobic respiration
chemical process in which oxygen is used to make energy from carbohydrates
define anaerobic respiration
respiration that occurs in the absence of oxygen
what is the energy used for
muscle contraction
glycogen as an energy store
- store found in the liver
- during exercise glycogen gets broken down into glucose to provide for respiration
lower resting heartrate
fitter
link between breathing rate and levels of vigorous exercise
- more vigorous exercise leads to increased breathing rate
- to bring more oxygen into the body
oxygen debt
amount of oxygen required to remove lactic acid
what does the liver do
- breaks down protein into urea
- converts glucose to glycogen and cellulose
- converts glycogen to glucose
- breaks down lactic acid to glucose
- breaks down alcohol
- turns glucose into fat
- turns fat into glucose
when is lactic acid made
during anaerobic respiration
transportation of lactic acid
through the blood from the muscle to the liver
