Published by:
CGP EDU Academic Team
Published on: August 21, 2026
Identify which of the following are considered physical barriers in innate immunity:
Text Solution
Verified by ExpertsThe correct answer is:
• Stomach acid is a physiological barrier, not a physical one. It destroys pathogens through its acidic pH but does not physically block their entry.
• While tears and saliva contain enzymes that can kill microbes (like lysozyme), they are considered part of the physiological barriers rather than physical barriers. They function by chemically breaking down microbes, not by physically blocking them.
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