Imagine a red blood cell in the artery supplying the small intestine, a cell that is on its way to deliver oxygen to the small intestine. From this point in the artery, how many capillary beds must this red blood cell pass through before it returns to the left ventricle of the heart? Hint: You’ll need to do a little research on this one! a. five b. two c. one d. four e. three 0.5 points Question 2 If atmospheric pressure is 760 mm Hg and pressure in the alveolar air is 758 mm Hg, … a. it is the end of normal expiration and there is no air flow. b. the volume of the chest cavity is at its minimum. c. it is the end of normal inspiration and there is no air flow. d. air is flowing into the lung. e. the diaphragm muscle is relaxed. 0.5 points Question 3 In humans, secretion of alveolar surfactant occurs late in fetal development. What specific problem does this cause for premature babies? a. Alveolar surface tension is low, babies cannot exhale. b. Alveoli are damaged because cells dry out. c. Alveolar mucus is too thick for efficient gas exchange. d. Babies have difficulty inflating their lungs. 0.5 points Question 4 The fetus gets its O2 from maternal blood in the placenta. How would the O2-dissociation curve for fetal hemoglobin compare with that of maternal hemoglobin? a. The fetal curve will be to the right. b. Fetal and maternal curves will be the same. c. Don't choose this one. d. The fetal curve will be to the left.