Which of the following has the broadest definition, referring to the use of biological systems or biological molecules in the manufacturing of commercial products?

The following eight rules are important to consider when determining the correct surgical codes EXCEPT

a. Only one bone operation is allowable per toe. b. Generally, two or more operations are allowable per incision. c. Unna's boot (gauze soaked in zinc oxide) is considered part of the surgery itself and does not warrant an additional allowance. d. Flexible casts are nothing more than a tape or bandage and do not warrant a casting benefit.

While checking a polarographic (Clark) electrode, you determine that the device fails to read 100% when exposed to pure O2. Which of the following actions would be the proper first step?

a. Check the silica crystals. b. Send the device out for repair. c. Replace the analyzer's batteries. d. Change the analyzer's fuel cell.