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Lordern Lordern
wrote...
Posts: 420
Rep: 1 0
6 years ago
Chief cells of the stomach secrete
 A) gastrin.
  B) mucus.
  C) pepsinogen.
  D) hydrochloric acid.



How many amino acids have been identified as vital for proper growth, development, and maintenance of health?
 A) 22
  B) 13
  C) 9
  D) 6
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6 years ago
C

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