A substance was poured into a cup and left outside. The next day it was completely stiff. What phase change caused the property change?

ANSWER; Rigor mortis

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.