BIOM 525 Quiz 4

The epithelium of which part of the respiratory tree is not ciliated? Selected Answer: Alveolar sacs Correct Answer: Alveolar sacs  Question 2 0 out of 1 points A 42-year-old woman with severe pulmonary fibrosis is evaluated by her physician and has the following arterial blood gases: pH = 7.48, PaO2 = 55 mm Hg, and PaCO2 = 32 mm Hg. Which statement best explains the observed value of PaCO2? Selected Answer: The decreased PaO2 inhibits breathing via peripheral chemoreceptors Correct Answer: The decreased PaO2 stimulates breathing via peripheral chemoreceptors  Question 3 0 out of 1 points The pH of venous blood is only slightly more acidic than the pH of arterial blood because Selected Answer: there is no carbonic anhydrase in venous blood Correct Answer: the H+ generated from CO2 and H2O is buffered by deoxyhemoglobin in venous blood  Question 4 1 out of 1 points Hypoxemia produces hyperventilation by a direct effect on the; Selected Answer: carotid and aortic body chemoreceptors Correct Answer: carotid and aortic body chemoreceptors  Question 5 0 out of 1 points According to Boyle's law of gases, the pressure of a gas at constant temperature is directly proportional to the volume of the gas in a chambe