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In what form is the majority of carbon dioxide that is generated by cellular respiration, transported to the lungs?

waelhammad
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2022-10-19
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In what form is the majority of carbon dioxide that is generated by cellular respiration, transported to the lungs?

  1. as dissolved carbon dioxide in the blood plasma.
  2. bound to haemoglobin in red blood cells.
  3. as carbonic acid inside red blood cells.
  4. as bicarbonate ions in the blood plasma.
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waelhammad
2022-10-19
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D: CO 2 leaves cell as dissolved gas. About 7 % is transported in solution in plasma, 23 % bound to haemoglobin (HbCO 2 ) in rbc, while 70 % reacts with water to form carbonic acid, which forms bicarbonate ions. 

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