At normal liquid cylinder operating pressures, 1 lb of stored liquid O2 equals approximately how many liters of gaseous O2?

Normally, taken alone, neither substance would cause serious harm, but if taken together, the combination could cause coma or death. This is an example of:

A) synergism. B) efficacy. C) duration of action. D) summation.

The detection of a bulging mass through the belly button that is not pulsating should make the EMT suspicious that the patient may be suffering from which of the following?

A) Ulcer B) Gastroenteritis C) Hernia D) Abdominal aortic aneurysm