Question

When $C{{O}_{2}}$ concentration in blood increases, breathing becomes

• A. shallower and slow
• B. there is no effect on breathing
• C. slow and deep
• D. faster and deeper

Answer 1

Answer: (D)

faster and deeper

Answer 2

When $C{{O}_{2}}$ concentration in blood increases breathing becomes faster and deeper. The effect of increased $C{{O}_{2}}$ is to decrease the affinity of haemoglobin for ${{O}_{2}}$ . Thus due to Bohrs effect the $C{{O}_{2}}$ released in respiring tissue accelerates the delivery of oxygen by faster and deeper breathing.