If the SA node fails to fire and the AV junction becomes the heart's primary pacemaker, the rhythm ...

If the SA node fails to fire and the AV junction becomes the heart's primary pacemaker, the rhythm depicted on the EKG is called:
 
  a. normal sinus.
  b. atrial fibrillation.
  c. premature junctional complex.
  d. junctional escape.

Question 2

When considering the damaging effects of radiation, which of the following should be considered?
 
  a. Alpha radiation is harmless and of no concern.
  b. Time, distance, and shielding will provide the basis for protection.
  c. Never approach a victim who has been exposed to gamma radiation as it is potentially lethal to the rescuer.
  d. There is no shielding currently available for the effects of gamma radiation.