Search the Department of Education's Website

Human Respiration Pre-test

Download printable version (PDF format, two pre-tests per page)

Name____________________

1. How long do you think you can hold your breath? ________ seconds
2. When you hold your breath, what do you think happens to the oxygen concentration in the air in your lungs?

   Circle one:

   • Increases
   • Decreases
   • Remains the same

   Explain why:
   

3. When you hold your breath, what do you think happens to the carbon dioxide concentration in the air in your lungs? Circle one:

• Increases
• Decreases
• Remains the same

  Explain why:
  

4. What do you think prevents people from holding their breath longer?
5. What forces air into your lungs during inspiration?
6. What forces air out of your lungs during expiration?
7. What is the fate of the oxygen you inhale?
8. What is the source of the carbon dioxide you exhale?
9. How are these gases transported through your bloodstream?

The University of Minnesota is an equal opportunity educator and employer.
© 2008 University of Minnesota Duluth
Read our Privacy Statement | Last Modified on: Sunday, 01-Jun-2008 13:19:33 CDT