Carbon dioxide transport in the blood

Question 1

Where is CO2 picked up by the blood?

Answer 1

At the tissue

Question 2

What percentage of CO2 is dissolved in the blood?

Answer 2

~10%

Question 3

What percentage of CO2 is transported as bicarbonate?

Answer 3

~60%

Question 4

What percentage of CO2 is transported as carbamino compounds?

Answer 4

~30%

Question 5

Which enzyme converts CO2 and water to Carbonic acid?

Answer 5

Carbonic anhydrase

Question 6

What is the equation for the conversion of CO2 to Bicarbonate?

Answer 6

Question 7

How are bicarbonate ions moved out of the red blood cells?

Answer 7

By a chloride shift, in which they are exchanged for chloride ions

Question 8

What happens to the H+ ion product formed during bicarbonate production?

Answer 8

It is then buffered by haemoglobin to form HbH

Question 9

What forms carbamino compounds in the blood?

Answer 9

The combination of CO2 with terminal alanine groups of blood proteins, especially the global proteins of haemoglobin (To give carbamino-haemoglobin)

Question 10

What is meant by the Haldane effect?

Answer 10

Removing the O from haemoglobin increases the ability of Hb to pick up CO2 and CO2 generated H+

Question 11

Give an overview of CO2 transport in the blood (Diagram)

Answer 11