Q:

What mechanism transports the largest portion of oxygen around the body?

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What mechanism transports the largest portion of oxygen around the body?


  1. oxygen is carried bound to plasma proteins
  2. oxygen is transported in solution dissolved in blood plasma
  3. oxygen is bound to haemoglobin within red blood cells
  4. oxygen is transported as bicarbonate after reacting with water to form carbonic acid

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C: Haemoglobin within rbc is the protein that binds to oxygen enabling its transport. 

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