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huck4 huck4
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6 years ago
Exercising on a bicycle or treadmill during a stress test stresses the heart and requires more ________ for the heart muscle cells.
 
  a. helium
  b. hydrogen
  c. carbon dioxide
  d. oxygen
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BubbblesBubbbles
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huck4 Author
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6 years ago
Brilliant ツ
Ivansitospeed@g
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Yesterday
Helped a lot
jamesbove
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2 hours ago
Smart ... Thanks!
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