Innate Immunity and Pattern Recognition Receptors

Innate immunity provides initial defense against microbes by several mechanisms, including epithelial barriers, phagocytes, NK cells, and the Complement system. Adaptive immunity develops later and is mediated by lymphocytes and their products.

Phagocytes play a crucial role in the innate immune response by engulfing and killing bacteria.

The interferon system is a part of the innate immune response that produces interferons, which can inhibit viral replication and enhance the killing of virus-infected cells.

<p>Epithelial barriers are physical barriers, such as the skin and mucous membranes, that prevent the entry of microbes into the body.</p> Signup and view all the answers

<p>Complement and Toll-like receptors can recognize microbial components and trigger inflammatory responses, leading to the recruitment of phagocytes and other immune cells to the site of infection.</p> Signup and view all the answers

<p>macrophages, neutrophils, and NK cells (A)</p> Signup and view all the answers

<p>Innate immunity provides specific immunity against subsequent exposure, while adaptive immunity does not. (D)</p> Signup and view all the answers

<p>Innate immunity recognizes foreign antigens through special, non clonally distributed receptors. (D)</p> Signup and view all the answers

<p>Adaptive immunity (B)</p> Signup and view all the answers

<p>macrophages, neutrophils, and NK cells (B)</p> Signup and view all the answers