QUESTION 6 All exhalation is caused by contraction of the diaphragm contraction

Question

QUESTION 6

All exhalation is caused by

contraction of the diaphragm

contraction of abdominal muscles.

elastic recoil of the lungs.   

contraction of internal intercostals.

5 points   

QUESTION 7

When using the lung models, what happened when you pulled the "diaphragm"?

air was forced out of the balloons.

the volume of the "thoracic cavity" increases and air flowed into the balloons.

the volume of the "thoracic cavity" increases and air flowed out of the balloons.

nothing happened.

6 points   

QUESTION 8

Which is a greater driving force for breathing: O2 or CO2?

O2

CO2

5 points   

QUESTION 9

What happens to the rate of breathing as CO2 levels rise?

the rate increases.

the rate decreases.

the rate stays the same.

6 points   

QUESTION 10

Describe the change in respiratory rate (it should increase) when the subject breathed into the bag for 2 minutes.

the rate increased because of the body's need for additional O2.

the rate decreased because of the body's need for additional O2.

the rate increased because of the body's attempt to eliminate CO2.

the rate increased because of the body's attempt to eliminate O2.

contraction of the diaphragm

contraction of abdominal muscles.

elastic recoil of the lungs.   

contraction of internal intercostals.

Explanation / Answer

6. Elastic recoil of lungs

7. Air was forced out of the ballon

8. CO2

9. Stay the same

10. The rate increased because of the body's attempt to eliminate O2

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