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Posted 2 months ago
What are the possible ways the immune system can respond when the body is invaded by foreign microorganisms such as bacteria or viruses?
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Answer from Sia
Posted 2 months ago
The immune system can respond to foreign microorganisms through various mechanisms.
Innate Immune Response: This is the body's first line of defense and includes physical barriers like skin and mucous membranes, as well as immune cells like macrophages and neutrophils that can quickly respond to invaders
Adaptive Immune Response: This involves the activation of lymphocytes (B cells and T cells) that specifically recognize and target foreign microorganisms. B cells produce antibodies, while T cells can directly kill infected cells
Inflammation: This is a localized response to infection that involves the release of signaling molecules like cytokines, which increase blood flow and attract immune cells to the site of infection
Key Concept
Immune System Response
The immune system employs both innate and adaptive mechanisms to defend against foreign microorganisms. The innate response provides immediate, non-specific defense, while the adaptive response offers a specific and long-lasting defense. Inflammation helps to recruit immune cells to the site of infection.

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