Question

select all that apply
choose all the features of skin that offer immunoprotection.

the presence of interferons
the presence of lactic acid
the presence of complement
the presence of defensins
the presence of a continuous barrier to the external environment

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Explanation:

• Lactic acid: The skin's acidic pH (due to lactic acid in sweat, etc.) inhibits microbial growth, contributing to immunoprotection.
• Defensins: These are antimicrobial peptides in the skin that help kill or inhibit pathogens.
• Continuous barrier: The skin's epidermis forms a physical barrier, preventing pathogen entry.
• Interferons are more associated with viral defense in cells, not primary skin immunoprotection features here. Complement is part of the blood - borne immune system, not a primary skin - based immunoprotective feature.

Answer:

B. The presence of lactic acid, D. The presence of defensins, E. The presence of a continuous barrier to the external environment