It was Alaska that entered
Http://nationalinterest.org/blog/the-buzz/why-ulysses-s-grant-was-one-americas-greatest-leaders-17952
Stress signals are the ways you express stress for example: ruminating thoughts, shaking of legs, pacing.
Stressors are things that stress you, for example relationship problems or exam.
while you have to answer this question for yourself, I can give you some examples:
shaking before an exam
ruminating thoughts before meeting parents
pacing before a flight
It is complex language and homo sapiens.
