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chinguun chinguun
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6 years ago
Melatonin is produced by the
 A) pituitary gland.
  B) thymus gland.
  C) pineal gland.
  D) heart.



An important cardiac glycoside is
 A) digoxin
  B) atropine
  C) morphine
  D) potassium
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tainataina
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6 years ago
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