All of the following are symptoms of pacemaker malfunction EXCEPT:

How does muscle relaxation improve physical function and reduce stress?

a. Burns excess calories b. Improves blood circulation c. Releases endorphins d. Strengthens the muscles

For x-ray and gamma ray photons with energies up to 3 million electron volts (MeV), which of the following radiation quantities may be defined as the measure of the total electric charge of one sign, either all pluses or all minuses, per unit mass that these two types of radiation generate in dry air at standard temperature and pressure (760 mm Hg or 1 atmosphere at sea level and 22"1e C)?

a. Absorbed dose b. Equivalent dose c. Exposure d. Collective effective dose