Question

Acquired immunity is characterized by "memory." What happens during a secondary (anamnestic) response?

• A. The body produces a low-intensity response to a new pathogen.
• B. The body produces a high-intensity response upon a second encounter with the same pathogen.
• C. The body loses the ability to produce antibodies.
• D. The innate barriers are bypassed by the pathogen.

Answer 1

Answer:

B. The body produces a high-intensity response upon a second encounter with the same pathogen.

• Acquired immunity develops during a person's lifetime and remembers specific pathogens. While the first encounter results in a low-intensity primary response, a second encounter with the same pathogen triggers a high-intensity secondary (anamnestic) response.