Intrinsic movement of the body generated by physiological rhythms and reflex mechanics

Specific gravity of vapors and gases is termed:

A) vapor density. B) vapor percentage. C) vapor weight. D) gas density.

The scene size-up at a motor vehicle crash or other incident:

A. is an ongoing process until the incident is terminated. B. should be performed by the most experienced EMT. C. is a quick visual assessment of the scene prior to entry. D. determines who is allowed to safely enter the hot zone.