Which of the following is not an action of complement? (a)...

Name: Problem 3, Chapter 45: Biology
Uploaded: 2021-08-07T23:53:04-08:00
Duration: 2 min 34 s
Channel: Bryan Valdivia
Description: Which of the following is not an action of complement? (a) enhances phagocytosis (b) enhances inflammatory response (c) coats pathogens (d) lyses viruses (e) stimulates production of memory T cells.

Which of the following is not an action of complement? (a) enhances phagocytosis (b) enhances inflammatory response (c) coats pathogens (d) lyses viruses (e) stimulates production of memory T cells.

Key Concepts

Complement System

A key component of the innate immune system, the complement system consists of plasma proteins that, when activated, participate in a cascade of reactions to help defend the body against pathogens. It enhances phagocytosis, promotes inflammation, and can directly lead to the lysis of certain pathogens through the formation of the membrane attack complex.

Opsonization

Opsonization refers to the process by which pathogens are coated with molecules, such as complement proteins, to flag them for ingestion and destruction by phagocytic cells. This coating enhances the efficiency of the immune response by promoting the recognition and uptake of antigens.

Membrane Attack Complex

The membrane attack complex (MAC) is the end product of the complement activation cascade. It forms a pore in the target cell's membrane, leading to lysis of the cell. While effective against certain bacteria, it is not typically involved in the direct lysis of viruses.

Inflammatory Response

The complement system generates fragments that act as anaphylatoxins, which rapidly induce inflammation by increasing vascular permeability and recruiting immune cells to the site of infection. This localized inflammatory response is crucial for limiting the spread of pathogens.

Adaptive Immunity

Adaptive immunity involves antigen-specific responses that lead to the development of immunological memory, primarily through the activation and production of memory T cells. Unlike the innate responses mediated by the complement system, adaptive immunity provides long-lasting protection and a rapid response upon re-exposure to pathogens.

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