Which of the following statements is correct about the respiratory pigments?
Correct answer: C. Myoglobin has more affinity for oxygen as compared to haemoglobin
- A. Myoglobin and Haemoglobin has higher affinity for nitrogen
- B. Cyanide and Haemoglobin has a low affinity for oxygen
- C. Myoglobin has more affinity for oxygen as compared to haemoglobin
- D. Albumin, Globulin and Globin proteins are present in respiratory pigments
Explanation
Myoglobin's affinity for oxygen is higher than haemoglobin. And unlike haemoglobin which is found in the red blood cells, myoglobin is found in muscle tissues. Thus, haemoglobin's lower affinity for oxygen serves it well because it allows haemoglobin to release oxygen more easily in the cells. Myoglobin, on the other hand, has a significantly higher affinity for oxygen and will therefore be much less inclined to release it once it is bound.
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About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
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