RESPIRATION 4: Gas Transport Flashcards
1
Q
How is most oxygen transported in the blood?
A
Bound to hemoglobin (~98.5%).
2
Q
What is the Bohr effect?
A
High CO₂ and low pH reduce hemoglobin’s oxygen affinity, enhancing O₂ release to tissues.
3
Q
What causes a right shift in the O₂-Hb dissociation curve?
A
Increased temperature, CO₂, H⁺ (low pH), or 2,3-DPG.
4
Q
What causes a left shift in the O₂-Hb curve?
A
Lower temperature, CO₂, H⁺ (high pH).
5
Q
How is most CO₂ transported in the blood?
A
As bicarbonate ions (~70%).
6
Q
What enzyme catalyzes CO₂ to bicarbonate conversion?
A
Carbonic anhydrase.
7
Q
What is the Haldane effect?
A
Deoxygenated Hb binds CO₂ more readily.
8
Q
What is 2,3-DPG and its role?
A
A molecule produced by RBCs that decreases Hb’s affinity for O₂.
