System that fights disease and controls the immune response

Whats the difference between epinephrine and norepinephrine?

What condition is most likely present when a normal p wave is negatively deflected?

Which of these is the best example of sexual objectification? a) a female initiates a conversation with another female. b) a male proposes marriage to a female. c) a female makes repated coments to a male about his appearence. d) a female proposes marriage to a male.