Answer to Question 1
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.
Answer to Question 2
ANS: C
One purpose of the inflammatory process is to prevent infection and further damage by contami-nating microorganisms. Specific response toward antigens is a part of the complement system that assists in the inflammatory response, but not its purpose. Lysis of cell membranes is part of the process of phagocytosis, which removes foreign material. Immunity cannot be achieved against future tissue injury.