Class 12 · Human Health and Diseases

Heroin: Drug Action & Health Impact — NEET Biology

🔥 Predicted for NEET 2027
📖 NCERT Source

Generally taken by snorting and injection, heroin is a depressant and slows down body functions.

NCERT Biology · Class 12 · Chapter 7 · Paragraph 66
Why This May Be Tested in NEET 2027

Adjacent to a frequently-asked paragraph in the same chapter.

Practice This Concept
QuestionPredicted for NEET 2027

Which of the following best explains why heroin is highly addictive?

📖 Solution & NCERT Explanation
View solution & NCERT explanation

Correct answer: A It mimics endorphins and produces false pain relief

Heroin binds to opioid receptors and mimics natural endorphins, creating a strong sense of pleasure and pain relief that reinforces repeated use.

❓ Frequently Asked Questions
What does NCERT say about Generally taken by snorting?
Generally taken by snorting and injection, heroin is a depressant and slows down body functions.
Has this concept appeared in NEET?
High probability for NEET 2027. Adjacent to a frequently-asked paragraph in the same chapter.
Which chapter is this from?
Human Health and Diseases, Class 12 NCERT Biology.

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.

176/180
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.

176 of 180 ReNEET 2026 questions traced to MedicNEET17,000+ Biology questionsHindi + English
Free to start · Hindi + English · 43,000+ questions · NEET 2026 pattern
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