Question

In response to a decrease in blood pH, the respiratory center sends nervous impulses to

• A. Increase breathing rate
• B. Decrease breathing rate
• C. Increase heart beat
• D. None of th above

Answer 1

The correct option is A Increase breathing rate

Respiratory centre is located in the medulla oblongata and pons. They control the rate and depth of respiratory movements of the diaphragm. The increase in CO${}_2$ level in the blood lowers the pH of the blood which in response cause respiratory center to send impulses to breath fast and increase breathing rate.

So the correct answer is 'Increase breathing rate'.