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NEET2020ZoologyBreathing and Exchange of GasesActual

Identify the wrong statement with reference to transport of oxygen.

Options

  1. APartial pressure of CO 2 can interfere with O 2 binding with haemoglobin
  2. BHigher H + conc. in alveoli favours the formation of oxyhaemoglobin
  3. CLow pCO 2 in alveoli favours the formation of oxyhaemoglobin
  4. DBinding of oxygen with haemoglobin is mainly related to partial pressure of O 2

Correct answer

B. Higher H + conc. in alveoli favours the formation of oxyhaemoglobin

Step-by-step solution

Body tissue obtains oxygen from oxyhaemoglobin because of its dissociation caused by low O 2 and high CO 2 concentration. Under a given concentration of oxygen in the blood, dissociation of oxyhaemoglobin will increase if the pH of the blood falls (increase in H + concentration). When the partial pressure of CO 2 rises (blood pH decreases), the dissociation curve of Oxyhaemoglobin at 37 °C shift to the right. Effect of high pCO 2 , high temperature and low pH are similar. p50 indicates the oxygen concentration

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