Question

When carbon dioxide concentration in blood increases, breathing becomes ............ and ...........

• A. Shallower and slow
• B. Slow and deep
  
• C. Faster and deeper
  
• D. None of the above

Answer 1

The correct option is C Faster and deeper

When the concentration of carbon dioxide increases in blood that results in decreasing the affinity of hemoglobin towards oxygen or amount of oxygen is less in blood. To compensate the oxygen amount breathing goes faster and deeper and is known as hyperventilation which is controlled by the medullary respiratory center.

So the correct option is 'Faster and deeper'.