Which gas is used to test the physiologic effectiveness of the alveolary-capillary membrane?

The MOS is a(n) ____ in a sealed unit that has a wheatstone bridge sensor in it surrounded by a coating of a metal oxide.

A. metal B. conductor C. semiconductor D. insulator

Expenses that are not covered by an insurance plan are called ________.

Fill in the blank(s) with the appropriate word(s).