Cardiovascular

Question 1

Carbon dioxide transport

Answer 1

• CO2 is transported through the circulatory system in 3 ways:

Question 2

CO2 effect on O2 dissociation

Answer 2

We know that oxygen dissociate from haemoglobin where PO2 is low
If H+ ions can bind with Hb, they must compete with oxygen
In respiring tissue:
- more CO2 produced
- more carbonic acid formed
- more H+ dissociated
- more competition for Hb
- more oxygen dissociatIon
In CO2 rich environment (I.e at respiring tissue), more oxygen dissociates from oxyhemoglobin
- The H+ reduces the affinity of the haemoglobin for oxygen
- oxygen dissociation curve shifts to the right this known as Bohr effect / shift