Vaccination increases the number of (A) different receptors...

Vaccination increases the number of
(A) different receptors that recognize a pathogen.
(B) lymphocytes with receptors that can bind to the pathogen.
(C) epitopes that the immune system can recognize.
(D) MHC molecules that can present an antigen.a

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Key Concepts

Vaccination

Vaccination is the process of introducing an antigen into the body in a controlled manner to stimulate the immune system to develop adaptive immunity without causing disease. It primes the immune system to mount a rapid and specific response upon real pathogen exposure by boosting the population of antigen-specific lymphocytes.

Adaptive Immunity

Adaptive immunity is the component of the immune system that develops targeted responses to specific pathogens. It involves highly specialized cells, such as B and T lymphocytes, which recognize and remember unique antigens offered by pathogens through specific receptors.

Lymphocytes

Lymphocytes are central players in adaptive immunity, comprising B cells and T cells. They are responsible for recognizing pathogens through specific receptors on their surfaces. Once activated, these cells proliferate and differentiate, providing a tailored response to infections.

Clonal Expansion

Clonal expansion describes the process wherein a lymphocyte that successfully binds to an antigen proliferates to produce a pool of identical cells. This mechanism is fundamental for increasing the number of lymphocytes with receptors specific to a given pathogen, enabling a robust immune defense.

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