Biology, 05.08.2019 00:30 arianawelsh123l
Which of the following most likely happens when we exercise? a. the heart rate slows down because the blood vessels have less blood to circulate. b. the heart rate slows down because the blood vessels have more blood to circulate. c. the heart pumps faster so that the blood vessels can carry more oxygen to some cells. d. the heart pumps faster so that the blood vessels can carry more carbon dioxide to some cells.
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Which of the following most likely happens when we exercise? a. the heart rate slows down because t...
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