The Respiratory System: Control of Respiration
1. Where in the medulla are the neurons that set the basic respiratory rhythm? _______________
2. What modifies this medullary center?
a.
b.
3. What is the most important stimulus controlling ventilation? ___________
4. What ion directly stimulates the central chemoreceptors? _____________
5. Arterial Po2 must drop below what to stimulate the peripheral
chemoreceptors? _____________
6. If a person hyperventilates what will happen to the following in the blood?
a. Pco2 _____________
b. pH _____________
7. If a person hypoventilates what will happen to the following in the blood?
a. Po2 _____________
b. Pco2 _____________
8. a. What does lung hyperinflation stimulate? _________________________
b. The effect on inspiration is _________________________.
c. What is this reflex called? _________________________
9. Dust, smoke, and noxious fumes will stimulate receptors in airways.
a. Name the receptors. _________________________
b. Explain the protective reflexes.
10. Name four of the six factors that probably increase ventilation during exercise.
c.
d.
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