Health, 13.10.2019 01:30 elijahjacksonrp6z2o7

George is running a 5-km race and his cells need more oxygen. which change will his body meet the increased demand for oxygen?
a. his heart beating more quickly.
b. his breathing becoming more shallow.
c. his pancreas releasing more insulin..
d. his sweat glands becoming more active

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George is running a 5-km race and his cells need more oxygen. which change will his body meet the i...