Multiple choice

Which among the following statements does not characterises cellular respiration?

  1. The capillaries are permeable to oxygen.

  2. The body cells use ATP for all metabolic reactions.

  3. Each body cell releases carbon dioxide into nearby capillaries by perfusion.

  4. Blood with hemoglobin is able to transport 26 times more oxygen than plasma without hemoglobin.

  5. In the mitochondria of the cells, oxygen is consumed and carbon dioxide is produced.
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C Correct answer
Explanation

Each body cell releases carbon dioxide into nearby capillaries by diffusion, because the level of carbon dioxide is higher in the body cells than in the blood. In the capillaries, some of the carbon dioxide is dissolved in plasma and some is taken by the hemoglobin, but most enters the red blood cells where it binds with water to form carbonic acid.

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