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Which of the following is not a complement activation pathway?

A) Lectin pathway
B) Alternative pathway
C) Lactate pathway
D) Classical pathway

Answer :

Final answer:

The three known pathways of complement activation in the immune system are the Lectin pathway, the Alternative pathway, and the Classical pathway. These pathways are triggered in different ways, but all lead to the activation of the complement protein C3, thereby aiding in the destruction of pathogens. The Lactate pathway is not a complement activation pathway; it is related to metabolic processes.

Explanation:

The subject question asks, "Which of the following is not a complement activation pathway? A) Lectin pathway B) Alternative pathway C) Lactate pathway D) Classical pathway." Complement activation is a biological process that helps the body fight against infections. There are three known pathways through which this process is initiated, which are the Lectin pathway, Alternative pathway, and Classical pathway.

In the lectin pathway, the process is triggered by mannose-binding lectin attaching to carbohydrates on a microbial surface. The alternative pathway starts spontaneously without the need for a pathogen. It involves the breakdown of component C3. The classical pathway necessitates the need for specific antibodies to activate the complex sequence of the complement cascade. These three pathways all result in the activation of the complement protein C3. This process leads to the destruction of the invading pathogen

The Lactate pathway is not a complement activation pathway. The lactate pathway is related to metabolic processes not immune response. Therefore, the answer to the question is C) Lactate pathway.

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