Respiration and gas exchange Flashcards

1
Q

Explain the effect of physical activity on the pH of blood [3]

A

ph dec
increased rate of anaerobic resp
more co2
forms acid/co2 is acidic
anaerobic resp occurs
lactic acid produced

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2
Q

Explain why lactic acid conc in blood in trained cyclists different from untrained cyclists after exercise [4]

A

lower anaerobic respiration
less lactic acid produced
bc more oxygen supplied to muscles
less oxygen debt
less oxygen required to breakdown lactic acid
quicker breakdown of lactic acid

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3
Q

Suggest and explain why a sprinter can use anaerobic resp during race while marathon runner needs to use aerobic resp [4]

A

short time for sprinter
sprint needs lots of energy quickly
sprint oxygen supply not sufficient
anaerobic doesnt need oxygen
lactic acid removed after sprint
ref to oxygen debt

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4
Q

Crickets respiring aerobically in closed jar. Explain why temp inc [2]

A

heat released by crickets
ref to ke
pressure inc
inc co2 greenhouse effect
small closed space

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