Approximately seventy percent of carbon - dioxide absorbed by the blood will be transported to the lungs :

  • Option 1)

    as bicarbonate ions

  • Option 2)

    in the form of dissolved gas molecules

  • Option 3)

    by binding to R.B.C

  • Option 4)

    as carbamino - haemoglobin

 

Answers (1)

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.

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