Zoology - Breathing and Exchange of Gases Question with Solution | TestHub
Which of the following statements are true/false?
1. The blood transports carbon dioxide comparatively easily because of its highest solubility.
2. Approximately 8.9% of carbon dioxide is transported being dissolved in the plasma of blood.
3. The carbon dioxide produced by the tissues, diffuses passively into the bloodstream 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.
Options:
Answer:
Solution:
transport in blood : Transport ofby blood is much easier/simple than that ofdue to high solubility ofin water.
Most of the70% ofis transported as bicarbonatein blood. 23% as carbaminohaemoglobinand 7% ofis dissolved in the plasma.
produced by the tissues, diffuses passively into the blood plasma and reacts with water forming carbonic acid. The reaction occurs very rapidly inside RBCs because of the presence of enzyme carbonic anhydrase.
Chloride shift : To maintain electro-chemical neutrality of plasma many chloride ions diffuse from plasma into RBCs and bicarbonates pass out. The chloride content of RBCs increases when oxygenated blood becomes deoxygenated. This is termed as chloride shift or Hamburger shift.
Haldane's effect : Oxygenated blood behaves as strong acid. More and more oxyhaemoglobin is formed in lungs, which releasesincreasing the acidity of blood. Thiscombines with bicarbonate forming carbonic acid and soon dissociates.
