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InterviewSolution
| 1. |
Explain transport of oxygen ( class 11 ) |
| Answer» Transport of oxygen\tHaemoglobin is a red coloured iron containing pigment present in the RBCs.\tO2\xa0can bind with haemoglobin in a reversible manner to form\xa0oxyhaemoglobin.\tBinding of oxygen with haemoglobin is primarily related to partial pressure of O2\xa0and partial pressure of CO2, hydrogen ion concentration and temperature are the other factors which can interfere with this binding.\tA\xa0sigmoid curve\xa0is obtained when percentage saturation of haemoglobin with O2\xa0is plotted against the pO2\xa0and the curve is called the\xa0oxygen dissociation curve.\tpCO2, H+\xa0concentration have effect on binding of O2\xa0with haemoglobin.\tIn the alveoli, where there is high pO2, low pCO2, lesser H+\xa0concentration and lower temperature, the factors are all favourable for the formation of oxyhaemoglobin, and where low pO2, high pCO2, high H+\xa0concentration and higher temperature exist, the conditions are favourable for dissociation of oxygen from the oxyhaemoglobin.\tEvery 100 ml of oxygenated blood can deliver around 5 ml of O2\xa0and each haemoglobin molecule can carry a maximum of four molecules of O2. | |