Chapter 35: Gas Transport & pH

Chapter 35. Gas Transport & pH

Most of the CO₂ transported in the blood is

A. dissolved in plasma.

B. in carbamino compounds formed from plasma proteins.

C. in carbamino compounds formed from hemoglobin.

D. bound to Cl⁻.

E. in HCO₃⁻.

Which of the following has the greatest effect on the ability of blood to transport oxygen?

A. Capacity of the blood to dissolve oxygen

B. Amount of hemoglobin in the blood

C. pH of plasma

D. CO₂ content of red blood cells

E. Temperature of the blood

Which of the following is true of the system?

A. Reaction 2 is catalyzed by carbonic anhydrase.

B. Because of reaction 2, the pH of blood declines during hyperventilation.

C. Reaction 1 occurs in the red blood cell.

D. Reaction 1 occurs primarily in plasma.

E. The reactions move to the right when there is excess H⁺ in the tissues.

In comparing uncompensated respiratory acidosis and uncompensated metabolic acidosis which one of the following is true?

A. Plasma pH change is always greater in uncompensated respiratory acidosis compared to uncompensated metabolic acidosis.

B. There are no compensation mechanisms for respiratory acidosis, whereas there is respiratory compensation for metabolic acidosis.

C. Uncompensated respiratory acidosis involves changes in plasma [HCO₃⁻], whereas plasma [HCO₃⁻] is unchanged in uncompensated metabolic acidosis.

D. Uncompensated respiratory acidosis is associated with a change in Pco₂, whereas in uncompensated metabolic acidosis Pco₂ is constant.