RESPIRATORY GASES LAB REVIEW QUESTIONS

Question 1

The stimulus to breath comes from?

Answer 1

the stimulus to breath comes from chemoreceptors in the brain, aortic arch, and carotid picking up increased levels of hydrogen ions

Question 2

List the ways that CO2 can be transported in the blood. Which is the most common?

Answer 2

CO2 can be transported by dissolving, attaching to hemoglobin, or forming a bicarbonate ion; the third is most common

Question 3

How does exercise affect the partial pressure of blood in the alveolus, active muscle cells, and circulatory vessels?

Question 4

When someone is hyperventilating, why are they told to do so in cupped hands or in a paper bag?

Question 5

If someone is passed out, what blood gases exchanges have caused this to occur?

Answer 5

their oxygen levels must have decreased to the “pass out point” 25 - 35mmHg and their carbon dioxide levels must have increased above 50mmHg