Choose the three best explanations for why Mrs. H's alveoli might collapse if she does not do her deep breathing with the Incentive spirometer. A) The alveoli are lined with water, and attraction between the water molecules pulls them together. This surface tension will pull the alveoli closed if she does not open them with deep breathing. B) When she is lying down, it is harder for her to expand her chest cavity anyway. She needs to put extra effort into it. C) The anesthesia was toxic to her lung cells, and she needs to clear it out of her alveoli as fast as she can. D)B Surgery stimulated her sympathetic system, which has constricted her bronchioles and could lead to an asthma attack. E) Shallow breathing that does not fill her lungs will only move air into the alveoli in the upper part of her lungs, letting those in the lower part stay closed. F) With her gall bladder removed, she cannot produce the soapy substance that lines alveoli and makes them easier to inflate.

E) Shallow breathing that does not fill her lungs will only move air into the alveoli in the upper part of her lungs, letting those in the lower part stay closed.

A) The alveoli are lined with water, and attraction between the water molecules pulls them together. This surface tension will pull the alveoli closed if she does not open them with deep breathing.

B) When she is lying down, it is harder for her to expand her chest cavity anyway. She needs to put extra effort into it.