10
Question
Which of the following statements are true/false?
(1) The blood transports CO2 comparatively easily because of its higher solubility.
(2) Approximately 8.9 % of CO2 is transported being dissolved in the plasma of blood.
(3) The carbon dioxide produced by the tissues,diffuses passively into the blood stream and passes into red blood corpuscles and react with water to form H2CO3.
(4) The oxyhaemoglobin(HbO2) of the erythrocytes is basic.
(5) The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance.
Which of the following statements are true/false?
(1) The blood transports CO2 comparatively easily because of its higher solubility.
(2) Approximately 8.9 % of CO2 is transported being dissolved in the plasma of blood.
(3) The carbon dioxide produced by the tissues,diffuses passively into the blood stream and passes into red blood corpuscles and react with water to form H2CO3.
(4) The oxyhaemoglobin(HbO2) of the erythrocytes is basic.
(5) The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance.
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Solution
The correct option is A A, C and E are true, B and D are false.
The blood transports CO2 comparatively easily because of its higher solubility. About 5-7% of carbon dioxide is transported, being dissolved in the plasma of blood. The carbon dioxide produced by the tissues, diffuses passively into the blood stream and passes into red blood corpuscles and react with water to form H2CO3. The RBCs contain an enzyme carbonic anhydrase which accelerates this reaction. Therefore, when CO2 enters the RBCs carbonic acid is formed more rapidly and in larger quantity than in plasma. 5% of the total CO2 production is carried as carbonic acid.
The oxyhaemoglobinHbO2 of the erythrocytes is not basic. The study of oxygen-haemoglobin dissociation curve and the effect on it due to change in pH and CO2 concentration, is a certain proof of acidic nature of oxyhaemoglobin.
The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance, when bicarbonate ions diffuse out from the RBCs into the plasma, this is called as "Hamburger's phenomenon or chloride shift".
Thus, from the above discussion it is clear that A, C and E are true, B and D are false.
Therefore, the correct answer is option A.
The blood transports CO2 comparatively easily because of its higher solubility. About 5-7% of carbon dioxide is transported, being dissolved in the plasma of blood. The carbon dioxide produced by the tissues, diffuses passively into the blood stream and passes into red blood corpuscles and react with water to form H2CO3. The RBCs contain an enzyme carbonic anhydrase which accelerates this reaction. Therefore, when CO2 enters the RBCs carbonic acid is formed more rapidly and in larger quantity than in plasma. 5% of the total CO2 production is carried as carbonic acid.
The oxyhaemoglobinHbO2 of the erythrocytes is not basic. The study of oxygen-haemoglobin dissociation curve and the effect on it due to change in pH and CO2 concentration, is a certain proof of acidic nature of oxyhaemoglobin.
The chloride ions diffuse from plasma into the erythrocytes to maintain ionic balance, when bicarbonate ions diffuse out from the RBCs into the plasma, this is called as "Hamburger's phenomenon or chloride shift".
Thus, from the above discussion it is clear that A, C and E are true, B and D are false.
Therefore, the correct answer is option A.
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