What is the primary regulator of breathing rate?

Practice Questions

Q1
What is the primary regulator of breathing rate?
  1. Oxygen levels
  2. Carbon dioxide levels
  3. Blood pH
  4. Lung volume

Questions & Step-by-Step Solutions

What is the primary regulator of breathing rate?
  • Step 1: Understand that breathing is controlled by the body to get enough oxygen and remove carbon dioxide.
  • Step 2: Know that carbon dioxide (CO2) is a waste product produced when our body uses oxygen.
  • Step 3: Realize that when CO2 levels in the blood increase, it signals the body to breathe more to get rid of the excess CO2.
  • Step 4: Recognize that this increase in breathing rate is called 'respiratory drive.'
  • Step 5: Conclude that the primary regulator of how fast we breathe is the level of carbon dioxide in our blood.
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