In __________, a neutron transforms itself into a combination of a proton and an energetic electron.

Which of the following choices is NOT a cause of hives?

a. Virus b. Complication of lupus c. Allergens d. Emotional stress

Switching compressors during two-rescuer CPR:

A) should take no more than 15 seconds to accomplish. B) should occur every 2 minutes throughout the arrest. C) is necessary only if the compressor becomes fatigued. D) is performed after every 10 to 20 cycles of adult CPR.