Question

Consider a situation in which a person is infected with a certain type of bacteria, develops an immune response, and clears the infection. Months later, the same person is infected with the same species of bacteria. Consider the rate of development of the immune response. The second innate immune response will be ____________ the first innate immune response, while the second adaptive immune response will be ____________ the first adaptive immune response.

slower than; the same as

the same as; faster than

the same as; slower than

faster than; the same as

Answer 1

When a person is infected with a certain type of bacteria, develops immune responses and clears the infection. In this process the adaptive immune system of the body, develops memory cell. B lymphocytes of adaptive immune system make antibodies to invade the pathogen and develop memory cells that remember the same pathogen for faster antibody production in future infection. Notwithstanding the innate immune system retains no memory of previous infections.

So, the second innate immune response will be the same as the first innate immune response, while the second adaptive immune response will be faster than the first adaptive immune response.

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