What is true about RBCs in humans?

A) They transport 99.5 per cent of O₂

B) They carry about 20­-25 per cent of CO₂

C) They do not carry CO₂ at all

D) They transport about 80 per cent oxygen only

Answer: B) They carry about 20­-25 per cent of CO₂

Explanation: About 97 per cent of O₂ is transported by RBCs in the blood as oxyhaemoglobin and 20-25 per cent of CO₂ is transported by RBCs as carbamino-haemoglobin.

Also Check:

• How Many Muscles Are Involved In Breathing?
• What Is Tidal Breathing?
• What is the mechanism of breathing in humans?
• What Is Haemoglobin?
• Flashcards Of Biology For NEET Breathing And Exchange Of Gases

Stay tuned to BYJU’S to learn similar questions and important points related to breathing and exchange of gases.