Final answer:
Cytokines and chemokines are signaling molecules that coordinate the immune response by regulating immune cell function and attracting immune cells to the site of infection. The complement system is a group of proteins that work together to destroy pathogens and help with pathogen clearance, opsonization, and inflammation.
Step-by-step explanation:
When the immune system detects an infection, it triggers the production of cytokines and chemokines, which are signaling molecules that help coordinate the immune response. Cytokines act as messengers, communicating between immune cells and regulating their function. Chemokines attract immune cells to the site of infection.
The complement system is a group of proteins that work together to destroy pathogens in the blood and tissue fluids. It can be activated through three pathways: the classical pathway, the alternative pathway, and the lectin pathway. C-reactive proteins can activate the classical pathway of complement activation. The complement system helps with pathogen clearance, opsonization, and inflammation.