Question

Which of the following is true for acquired immunity

• A. Our immune system remembers each and every immunological encounter in our body.
• B. Acquired immunity is pathogen-specific.
• C. Can discriminate self and non-self cells
• D. All of the above

Answer 1

The correct option is D All of the above

Acquired immunity is pathogen-specific. This means that if a person has developed immunity against the Rubella (German measles) virus, it does not automatically mean that the person is also protected against the polio virus. And the immune system remembers each and every immunological encounter in our body. So if the body has encountered rubella then the person will be able to subdue the second round of polio infection very successfully. The immune system has an amazing ability to distinguish between your body's own cells (referred to as " self") and foreign cells (" nonself"). Each cell carries protein markers called antigens that identify it as self or nonself.