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kmtz77 kmtz77
wrote...
Posts: 490
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6 years ago
Which hormone helps establish day-night cycles?
 
  A) Melatonin B) Dopamine C) Thyroxine D) Norepinephrine

Question 2

The relatively diffuse collection of phagocytic cells throughout the body is called what?
 
  A) Monocyte-macrophage system B) Reticuloendothelial system
  C) Phagocytic system D) Both A and B
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Replies
wrote...
6 years ago
Answer to q. 1

A

Answer to q. 2

D
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