What term describes the body's specific defense mechanism against pathogens?

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The body's specific defense mechanism against pathogens is best described by the term "immune response." This refers to the highly coordinated and targeted actions undertaken by the immune system when it encounters specific pathogens, such as viruses, bacteria, or other foreign invaders. The immune response involves the identification of specific antigens presented by these pathogens, which then triggers a series of actions, including the activation of T cells and B cells that work to eliminate the threat.

While the immune system encompasses all elements of defense against pathogens, including both specific and non-specific responses, it is the immune response that specifically refers to the adaptation and targeting of the defense mechanisms to effectively combat a particular pathogen. This can include the production of antibodies by B cells or the action of cytotoxic T cells, illustrating how the body is able to recognize and remember specific pathogens for future protection.

The other options, while related to immune functions, do not encapsulate the specific action taken against pathogens to the same extent as "immune response." For instance, "immune system" is a broader term that refers to the whole network of cells and structures involved in the immune defense, while "pathogen resistance" indicates a general ability to withstand infections rather than the specific mechanisms at play. "Antigen recognition

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