Question

Oxygen transported in dissolved form in blood is

• A. $8mlof{O}_2/100\text{ml blood}$
• B. $\text{2 ml}{O}_2/100\text{ml blood}$
• C. $\text{3 ml}{O}_2/100\text{ml blood}$
• D. $\text{5 ml}{O}_2/100\text{ml blood}$

Answer 1

The correct option is C $\text{3 ml}{O}_2/100\text{ml blood}$

$O_2$ transport
There are 2 main ways in which $O_2$ is transported in the blood :
(i) Dissolved form
(ii) Oxyhaemoglobin
Nearly 97 percent of $O_2$ is transported as oxyhaemoglobin form whereas only 3 percent of it is carried in dissolved form.

Oxyhaemoglobin
So, transport of oxygen in dissolved form is $3\%$.
If the amount of O2 transport is measured in 100 mL then 3% is equal to 3 mL

Therefore, oxygen in dissolved form transported is 3 ml of O2 /100 ml blood.