Biology, 17.10.2019 11:30, ggcampos

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 pancreas releasing more insulin. c. his breathing becoming more shallow. 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...