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Home Q & A Board Biology-Related Homework Help General Biology
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mrsbmarie mrsbmarie
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5 years ago
During intense physical exercise, human cells and tissues increase their need for oxygen to provide the ATP necessary for work. Why does heart rate have to increase to meet the need for oxygen?
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Mhartman97Mhartman97
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5 years ago
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mrsbmarie Author
wrote...

5 years ago
Smart ... Thanks!
kobbhy
wrote...

Yesterday
Thank you, thank you, thank you!
annakc
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2 hours ago
Good timing, thanks!
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