Transport of Gases / Control of Breathing

Question 1

What are 2 ways O2 is transported?

Answer 1

1. dissolved in plasma
2. bound to haemoglobin (most this way)

Question 2

What is the main factor that determines % of O2 carried by Hb?

Answer 2

PO2 of blood (pressure)

Question 3

How do you measure oxygen saturation?

Answer 3

Oximeter -> measure % saturation of Hb in blood

Question 4

What are factors that affect O2/Hb Dissociation?

Answer 4

• pH
• PCO2
• Temp

Question 5

What are 3 things that cause O2/Hb dissociation curve to shift to the right?

Answer 5

• Acidosis
• increased PCO2
• increased Temp

Question 6

What are some things that cause O2/Hb dissociation curve to shift to the left?

Answer 6

• Alkalosis
• decreased PCO2