Understanding Oxygen and Carbon Dioxide Transport 189/2

What is the Oxygen dissociation curve used for?

• To measure blood pressure levels.

• To analyze carbon dioxide levels in the blood.

• The Oxygen dissociation curve is used to understand the binding and release of oxygen by hemoglobin in the blood.

• To determine blood pH levels.

How does pO2 affect the binding of O2 to haemoglobin?

• Lower pO2 has no effect on hemoglobin's affinity for O2.

• Higher pO2 increases hemoglobin's affinity for O2, enhancing binding.

• pO2 only affects the release of O2 from hemoglobin, not the binding.

• Higher pO2 decreases hemoglobin's affinity for O2, reducing binding.

What conditions in the alveoli favor the formation of oxyhaemoglobin?

• High partial pressure of carbon dioxide (pCO2) and low partial pressure of oxygen (pO2) in the alveoli.

• High partial pressure of oxygen (pO2) and low partial pressure of carbon dioxide (pCO2) in the alveoli.

• High levels of nitrogen and low levels of oxygen in the alveoli.

• High humidity levels and low temperature in the alveoli.

What factors in the tissues promote the dissociation of oxygen from haemoglobin?

• Increased carbon dioxide, lower pH, and higher temperature.

• Increased oxygen levels

• Higher pH

• Lower temperature

How much O2 can 100 ml of oxygenated blood deliver to tissues?

• 20 ml of O2

• 10 ml of O2

• 30 ml of O2

• 50 ml of O2

What percentage of CO2 is carried by haemoglobin as carbamino-haemoglobin?

• 15%

• 50%

• 30%

• 23%

How is the binding of CO2 to haemoglobin related to pCO2?

• The binding of CO2 to hemoglobin is unaffected by pCO2 changes.

• CO2 does not bind to hemoglobin regardless of pCO2 levels.

• The binding of CO2 to hemoglobin decreases with higher pCO2.

• The binding of CO2 to hemoglobin increases with higher pCO2.

What happens to the concentration of H+ in the tissues compared to the alveoli?

• The concentration of H+ is higher in the tissues than in the alveoli.

• The concentration of H+ is lower in the tissues than in the alveoli.

• The concentration of H+ is equal in the tissues and the alveoli.

• The concentration of H+ fluctuates randomly between the tissues and the alveoli.

Why is the temperature lower in the alveoli compared to the tissues?

• Tissues have a higher oxygen concentration than alveoli.

• The alveoli are insulated from external temperatures.

• The alveoli are warmer due to increased blood flow.

• The alveoli are exposed to cooler air and have less metabolic activity than tissues.

What role does pCO2 play in the transport of oxygen?

• pCO2 binds to oxygen, preventing its release in tissues.

• pCO2 decreases hemoglobin's affinity for oxygen, facilitating oxygen release in tissues.

• pCO2 increases hemoglobin's affinity for oxygen, enhancing oxygen uptake in lungs.

• pCO2 has no effect on oxygen transport in the bloodstream.