Approximately seventy percent of carbon - dioxide absorbed by the blood will be transported to the lungs :
as bicarbonate ions
in the form of dissolved gas molecules
by binding to R.B.C
as carbamino - haemoglobin
As we discussed in concepts
Oxyhaemoglobin -
O2 can bind with haemoglobin in a reversible manner to form oxyhaemoglobin.
- wherein
Each haemoglobin molecule can carry a maximum of four molecules of O2. Binding of oxygen with haemoglobin is primarily related to partial pressure of O2.
and
Carboxyhaemoglobin -
Carboxyhaemoglobin (symbol COHb or HbCO) is a stable complex of carbon monoxide and haemoglobin (Hb) that forms in red blood cells upon contact with carbon monoxide (CO).
- wherein
This condition is fatal.
70% O2 Transported through bicarbonate form (HCO3-)
25% O2 through carbomine Hb form
5% O2 in dissolved form
Option 1)
as bicarbonate ions
This option is incorrect.
Option 2)
in the form of dissolved gas molecules
This option is incorrect.
Option 3)
by binding to R.B.C
This option is correct.
Option 4)
as carbamino - haemoglobin
This option is incorrect.