Physical Barriers to Pathogen Entry — NEET Biology
📚 Practice ConceptPhysical barriers: Skin on our body is the main barrier which prevents entry of the micro-organisms. Mucus coating of the epithelium lining the respiratory, gastrointestinal and urogenital tracts also help in trapping microbes entering our body.
Assertion (A): Mucus coating helps protect the body from microbial infections. Reason (R): Mucus coating traps microbes entering through respiratory, gastrointestinal and urogenital tracts.
View solution & NCERT explanation
Correct answer: A — If both assertion and reason are true and the reason is the correct explanation of the assertion.
Both statements are true from NCERT. NCERT states “Mucus coating of the epithelium lining the respiratory, gastrointestinal and urogenital tracts also help in trapping microbes entering our body.” The Reason explains HOW mucus provides protection (Assertion) - by physically trapping microbes at entry points.
What does NCERT say about Physical barriers Skin on?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.