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19zbell 19zbell
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6 years ago
Biochemical secretions that trap and kill microorganisms include:
 
  a. hormones.
  b. neurotransmitters.
  c. earwax.
  d. gastric acid.
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6 years ago
ANS: C
Epithelial cells secrete several substances that protect against infection, including earwax. Hor-mones do not contain biochemical secretions that trap and kill microorganisms. Neurotransmitters carry important messages, and gastric acid helps break down food into its component parts, but neither contains biochemical secretions.
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