A.  INTRODUCTION  -- ANSWERS
    1.   The system of the human body which regulated chemical messages is the
             E N D O C R I N E   system. 

      2.    The   C H E M I C A L  secretions of the endocrine glands are known as
             H O R M O N E S

      3.    These hormones only function at selected target cells where they attack to
             specific   P R O T E I N    R E C E P TO R S

      4.    These hormones only get to their specific targets after circulating through the
             B L O O D      S T R E A M

      5.    Since these hormones do not have their own delivery tubes (DUCTS), they are
             known as  D U C T L E S S  (NOT DUCK LIST)  G L A N D S

           

 

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