What does the term `memory' of the I | Class 12 Biology Chapter Human Health and Disease, Human Health and Disease NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 7 in the current curriculum.

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Human Health and Disease. This page offers a step-by-step solution to the specific question from Exercise 0, Question 15:

What does the term `memory' of the Immune system mean?

. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 15:

What does the term `memory' of the Immune system mean?

Answer:

When the pathogen enters into the body for the first time, it produces an immune response by generating antibodies. This response is of low intensity. By ensuring encounter with the same pathogen brings out a highly intensified secondary response.

This explained the fact that our body appears to have memory of the first encounter. This type of secondary immune response brings out by memory T- cells and B- cells which keep ready to produce a rapid and vigorous attack as soon as the same pathogen infects the body again.  

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

  • Read the question carefully and focus on the core concept being asked.
  • Reference examples and data from the chapter when answering questions about Human Health and Disease.
  • Review previous year question papers to get an idea of how such questions may be framed in exams.
  • Practice answering questions within the time limit to improve your speed and accuracy.
  • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 15: What does the term `memory' of the Immune system mean?....

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