Which of the following is incorrect about the transport of gases by blood?

Question

Which of the following is incorrect about the transport of gases by blood? (A) The oxygen dissociation curve is sigmoid and shifts to the right at high pCO2, and low pH. (B) Every 100 ml of oxygenated blood can deliver around 5 ml of O2 to the tissues under normal physiological conditions. (C) The major factor affecting the formation of carbamino-hemoglobin is low H+ concentration. (D) Approximately 70% of carbon dioxide is carried as bicarbonates.

Tardigrade Admin · Accepted Answer

CO2 is carried by hemoglobin as carbamino-hemoglobin (about 20-25 percent). This binding is related to the partial pressure of CO2. pO2 is a major factor that could affect this binding. When pCO2 is high and pO2 is low as in the tissues, more binding of carbon dioxide occurs whereas, when the pCO2 is low and pO2 is high as in the alveoli, dissociation takes place.

Q. Which of the following is incorrect about the transport of gases by blood?

The oxygen dissociation curve is sigmoid and shifts to the right at high pCO₂, and low pH.

Every 100 ml of oxygenated blood can deliver around 5 ml of O₂ to the tissues under normal physiological conditions.

The major factor affecting the formation of carbamino-hemoglobin is low H⁺ concentration.

Approximately 70% of carbon dioxide is carried as bicarbonates.