B2 Respiration Flashcards
1
Q
Fitter (3)
A
Lower resting rate
Heart rate not increase as much
Shorter recovery period
2
Q
Advantage of increase in heart rate in pe (4)
A
More blood to muscle Supply more o2 and glucose Cells do more ae More energy released More co2 removed from muscles Prevent built up of lactic
3
Q
Why breathing rate and oxygen used still high after exercise (4)
A
An
Lactic acid
Remove it by reacting with o2 to release co2 and h2o
Removed by breathing
4
Q
3 changes in body (3)
A
Arteries dilate so more blood can reach muscles
Breathing rate increases to absorb more oxygen and remove co2 from blood
Depth of breathing increase
5
Q
During pe why co2 increase (2)
A
More respiration
Releasing co2
Co2 diffuses into blood
6
Q
Differences between aerobic and anaerobic (3)
A
More energy in ae
Requires oxygen ae
An releases lactic acid ae co2 h2o
Ae mitochondria an cytoplasm
7
Q
Why lactic acid produced (2)
A
Insufficient o2
So respire anaerobically
