Following has to be transported 1 point by the blood O Oxygen O Carbon dioxide O Nitrogen O Oxygen and Carbon dioxide
Answers
Answer:
For purposes of discussing oxygen transport by the blood, we will consider blood to be composed of two phases: plasma and red blood cells (RBCs). Oxygen is carried in the blood in two forms: (1) dissolved in plasma and RBC water (about 2% of the total) and (2) reversibly bound to hemoglobin (about 98% of the total). At physiological PO2, only a small amount of oxygen is dissolved in plasma since oxygen has such a low solubility. At elevated PO2 (breathing 100 % oxygen or during hyperbaric oxygenation), however, the physically dissolved form of oxygen can become significant. Henry's law states that the amount of oxygen dissolved in plasma is directly proportional to PO2: [O2] = α PO2, where α = 0.003 ml O2 (100 ml plasma)−1 mm Hg−1. Thus, at a PO2 of 100 mm Hg (a typical value for arterial blood), 100 ml of plasma contains 0.3 ml O2 (or 0.3 vol%).
Some of the carbon dioxide is transported dissolved in the plasma. Some carbon dioxide is transported as carbaminohemoglobin. However, most carbon dioxide is transported as bicarbonate. As blood flows through the tissues, carbon dioxide diffuses into red blood cells, where it is converted into bicarbonate.
Carbon dioxide is transported in the blood from the tissue to the lungs in three ways:1(i) dissolved in a solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly hemoglobin. Approximately 75% of carbon dioxide transport in the red blood cell and 25% in the plasma. The relatively small amount in plasma attributable to a lack of carbonic anhydrase plasma so an association with water is slow; plasma plays little role in buffering and combination with plasma proteins is poor.
please mark me as brainliest
Answer:
Correct option is
A
A, C and E are true, B and D are false.
The blood transports CO
2
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 H
2
CO
3
. The RBCs contain an enzyme carbonic anhydrase which accelerates this reaction. Therefore, when CO
2
enters the RBCs carbonic acid is formed more rapidly and in larger quantity than in plasma. 5% of the total CO
2
production is carried as carbonic acid.
The oxyhaemoglobinHbO
2
of the erythrocytes is not basic. The study of oxygen-haemoglobin dissociation curve and the effect on it due to change in pH and CO
2
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.