Question

Oxyhaemoglobin dissociates into oxygen and deoxyhaemoglobin at

• A. low $O_2$ pressure in tissue
• B. high $O_2$ pressure in tissue
• C. equal $O_2$ pressure inside and outside tissue
• D. all times irrespective of $O_2$ pressure

Answer 1

The correct option is A low $O_2$ pressure in tissue

Factors that dissociate oxygen from haemoglobin include:-

• The partial pressure of carbon dioxide is increased.
• Increase in hydrogen ion level (pH).
• Temperature is high
• The partial pressure of oxygen is low which is near tissue.

So the correct option is 'low $O_2$ pressure in tissue'