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Author Question: Which hormone helps establish day-night cycles? A) Melatonin B) Dopamine C) Thyroxine D) ... (Read 20 times)

Jipu 123

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on: Jul 3, 2018
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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olivia_paige29

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Reply #1 on: Jul 3, 2018
Answer to Question 1

A

Answer to Question 2

D


Jipu 123

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Reply 2 on: Jul 3, 2018
Gracias!

frankwu0507

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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