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What is the approximate CO2 content in arterial blood when the partial pressure of CO2 (PCO2) is 46mmHg?
What is the approximate CO2 content in arterial blood when the partial pressure of CO2 (PCO2) is 46mmHg?
- 52ml/dl (correct)
- 48ml/dl
- 56ml/dl
- 45ml/dl
What is the primary mechanism by which CO2 is transported in the blood?
What is the primary mechanism by which CO2 is transported in the blood?
- Physical solution in plasma
- Bound to hemoglobin in red blood cells
- As bicarbonate ions in plasma
- All of the above (correct)
What is the significance of the Haldane effect?
What is the significance of the Haldane effect?
- It facilitates the release of oxygen from hemoglobin in the tissues
- It facilitates the release of CO2 from the blood in the lungs (correct)
- It facilitates the uptake of oxygen by hemoglobin in the lungs
- It facilitates the uptake of CO2 by the blood in the tissues
How does the Bohr effect influence oxygen delivery to the tissues?
How does the Bohr effect influence oxygen delivery to the tissues?
Which of the following scenarios directly contributes to the Bohr effect?
Which of the following scenarios directly contributes to the Bohr effect?
Flashcards
CO2 content in arterial blood
CO2 content in arterial blood
The total amount of CO2 present in the arterial blood, totaling 48 ml/dl.
Tidal CO2
Tidal CO2
The average CO2 transported from tissues to lungs, about 4 ml per 100 ml of blood.
CO2 dissociation curve
CO2 dissociation curve
Graph showing the relationship between CO2 content of blood and CO2 tension (PCO2).
Haldane Effect
Haldane Effect
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Bohr Effect
Bohr Effect
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Study Notes
Transport of CO2
- CO2 content in arterial blood: 48ml/dL
- Physical solution: 3ml/dL
- Chemical combination in plasma and RBCs: 45ml/dL
- Tidal CO2: 4 ml of CO2 is transported from tissues to lungs in each 100 ml of blood during resting conditions
- CO2 dissociation Curve: illustrates the relationship between total CO2 content in blood and CO2 tension (PCO2)
At the Lungs
- PCO2 = 40mmHg → CO2 content = 48ml/dL
- At the tissues: PCO2 = 46mmHg → CO2 content = 52ml/dL
Haldane Effect
- Oxygen binding to hemoglobin in the lungs displaces/releases CO2 from blood to alveoli
Bohr Effect
- Increased CO2 and H+ shift the oxygen dissociation curve to the right
- Facilitates oxygen release to tissues
Important Effect
- Haldane effect is more important than Bohr effect.
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