Question

During its activation, the classical complement pathway is able to utilize part of the adaptive immune system.

a. True
b. False

Answer 1

False

Step-by-step explanation:

The classical complement pathway is part of the innate immune system, not the adaptive immune system. It is activated by the binding of antibodies (IgM or IgG) to antigens on the surface of pathogens. While antibodies are produced by the adaptive immune system, the activation of the classical complement pathway itself is an innate immune response.

Answer 2

The statement that the classical complement pathway can utilize part of the adaptive immune system is true. This pathway is activated when antibodies, which are part of the adaptive immune system, bind to a pathogen and trigger the complement system, thereby linking innate and adaptive immunities.

Step-by-step explanation:

During its activation, the classical complement pathway is able to utilize part of the adaptive immune system. This statement is true. The classical complement pathway is activated when C1 protein reacts with antibodies that are attached to a pathogen. This often occurs during an adaptive immune response, where the antibodies are specific to a pathogen and are produced by the immune system after exposure to the antigen. These antibodies, which are part of the adaptive immune system, help trigger the complement system, leading to a series of reactions that aim to neutralize and eliminate the pathogen.

The complement system is considered part of the innate immune system because it involves a series of proteins that are always present in the blood and can be rapidly activated in a non-specific manner. However, in the case of the classical pathway, it bridges innate immunity with adaptive immunity due to the involvement of antibodies. Moreover, innate immune responses, including aspects of the complement system.