An air embolism associated with diving occurs when:
A. the diver hyperventilates prior to entering the water.
B. the diver holds his or her breath during a rapid ascent.
C. the alveoli completely collapse due to high pressure.
D. high water pressure forces air into the mediastinum.
Answer: B. the diver holds his or her breath during a rapid ascent.
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The muscles of expression in the face (e.g., for smiling, frowning, and wrinkling the forehead) are:
A) Involuntary muscles B) Skeletal muscles C) Attached to face bones D) Embedded in cutaneous tissue
A 72-year-old man has severe shortness of breath. You find him sitting upright on the edge of his chair. His respiratory rate is 30, pulse is 100, and his skin is cool and wet. Which one of the following signs and symptoms would be most consistent with a history of congestive heart failure?
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