The Eyes and the Respiratory Tract Are Both Protected Against

question 54

Multiple Choice

The eyes and the respiratory tract are both protected against infections by

• A) the mucous membranes that cover their surface.
• B) the secretion of complement proteins.
• C) the release of slightly alkaline secretions.
• D) the secretion of lysozyme onto their surfaces.
• E) interferons produced by immune cells.

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