1.Where in the medulla are the neurons that set the basic respiratory rhythm? ______ 2.What modifies this medullary center? 3.What is the most important stimulus controlling ventilation? _____CO2______
4.What ion directly stimulates the central chemoreceptors? _____H+________ 5.Arterial Po2must drop below what to stimulate the peripheral chemoreceptors? ______60 mmHg_______ 6. If a person hyperventilates what will happen to the following in the blood? a. Pco 2 ______ Decrease in PCO2 _______ b. pH ______ Increase in pH _______ 7. If a person hypoventilates what will happen to the following in the blood? a. Po 2 _______ Decrease in PO2 ______ b. Pco 2 _____ Increase in PCO2 ________ 8. a. What does lung hyperinflation stimulate? __ Pulmonary stretch receptors (PSRs) ___ b. The effect on inspiration is ____________ inhibition _____________. c. What is this reflex called? ___ Inflation reflex or Hering-Breuer reflex ____ 9. Dust, smoke, and noxious fumes will stimulate receptors in airways. a. Name the receptors. __________ Irritant receptors _______________ b. Explain the protective reflexes. Remove irritants from the airways by invoking coughing and sneezing. 10.Name four of the six factors that probably increase ventilation during exercise. 1.Learned responses 2.Neural input from motor cortex 3.Receptors in muscles and joints 4.Increased body temperature 5.Epinephrine and norepinephrine 6.Epinephrine and norepinephrine
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