Question

What are the 3 different complement pathways ?

a) Classical, lectin, alternative
b) Alternative, lectin, classical
c) Lectin, classical, alternative
d) Classical, alternative, lectin

Answer 1

The three different complement pathways are classical, lectin, and alternative.

Step-by-step explanation:

The correct answer is a) Classical, lectin, alternative.

The complement system is a part of the immune system that helps in detecting and destroying pathogens. There are three different complement pathways: the classical pathway, the lectin pathway, and the alternative pathway. Each pathway is initiated by a different mechanism and leads to the activation of different complement proteins.

In the classical pathway, complement proteins bind to antibodies that have attached to an antigen on the surface of a pathogen. In the lectin pathway, complement proteins are activated by the binding of an acute-phase protein called lectin to a pathogen. The alternative pathway is spontaneous and does not require any specific trigger.