____ are positively or negatively charged particles released by electrolytes. 

The ground substance changes from a gel to a liquid depending on temperature. This property is called ___________

a. fixation b. thixotropy c. homogenization d. emulsification

Alternating current—current that pulses 60 times per second—is more dangerous than direct current because the pulses:

a. cause external injuries. b. produce higher amperage. c. create higher voltage. d. can cause the victim to remain in physical contact with the source of the current for a longer time.