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Kristen is running a half marathon. By her tenth minute of running, her breathing rate has increased from her resting rate.
Which statement best describes how her tissues are responding to her running?
They need more oxygen to function, so gas exchange needs to decrease.
They need more oxygen to function, so gas exchange needs to increase.
They need more carbon dioxide to function, so gas exchange needs to increase.
They need more carbon dioxide to function, so gas exchange needs to decrease.
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They need more oxygen to function, so gas exchange needs to increase.
Running raises metabolic rate, so tissues consume more O2 and produce more CO2; breathing and blood flow increase to deliver O2 and remove CO2, increasing gas exchange.
Running raises metabolic rate, so tissues consume more O2 and produce more CO2; breathing and blood flow increase to deliver O2 and remove CO2, increasing gas exchange.
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