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    Biology
  3. Study Set
    Human Anatomy and Physiology
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    Exam 9: The Endocrine System
  5. Question
    A Hormone Called ________ Is Believed to Play an Important
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A Hormone Called ________ Is Believed to Play an Important

Question 136

Question 136

Multiple Choice

A hormone called ________ is believed to play an important role in establishing the body's day-night cycle.


A) thymosin
B) cortisol
C) melatonin
D) aldosterone

Correct Answer:

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