Which of the following combines irreversibly with blood haemoglobin?

In which of the following is carbonic anhydrase primarily active?

Identify the correct group of statements:
$I.$ Oxygen is carried by haemoglobin
$II.$ Oxygen is carried by carbonic anhydrase
$III.$ $CO_{2}$ is carried by haemoglobin
$IV.$ $SO_{2}$ is carried by haemoglobin
$V.$ Only oxygen is transported by the blood
$VI.$ Only $CO_{2}$ is transported by the blood
Choose the correct option.

Which is called Hamburger shift?

Approximately $70\%$ of carbon dioxide absorbed by the blood is transported to the lungs:

Plotting the percentage saturation of hemoglobin with $O_2$ against $PO_2$ results in a: