In addition to inhalation, positive-pressure SCBA protects the wearer from exposure by _____.

A method for measuring total and allergen-specific IgE levels is the:

A) radioallergosorbent test (RAST). B) multiple allergosorbent test system (MAST). C) oral food challenge. D) intradermal test.

Which of the following are advantages of a Stead-Wells water seal spirometer compared with a chain-compensated water seal spirometer?

I. higher frequency response II. can measure subtle flow rates III. less affected by inertia IV. more accurate volume measurement A) I B) I and II C) I, II, and III D) I, II, III, and IV