Question

Based on the antibody concentration graph, why is the secondary immune response more effective?

• A. It is non-specific and occurs at birth
• B. It has a higher intensity due to memory of the first encounter
• C. It relies solely on physical barriers like the skin
• D. It decreases the concentration of antibodies in the blood

Answer 1

Answer:

B. It has a higher intensity due to memory of the first encounter

• Acquired immunity is characterized by memory. While the primary response is of low intensity, the second encounter with the same pathogen triggers a "secondary (anamnestic) response" which is of high intensity.