what is the role of mhc molecules in the recognition of infected cells by nk cells and what is the physiological significance of this recognition?

Dendritic cells can act as ______________ that signal the presence of infection. These cells can also be infected with virus. If the NK cells outnumber the infected dendritic cells, the NK cell will __________ the infected dendritic cells. This means that the __________ immunity triumphs over the viral infection.

If the infected dendritic cells outnumber the NK cells, they will mature into a form which goes to the ______ ______ ______ (3 words) where they will activate __ cells and initiate the __________ immunity.

Macrophages and NK cells act synergistically to mutually activate one another to fight off virus infections. Macrophages produce the chemokine _____________ to attract NK cells. They also produce the cytokines _________ and __________ to activate NK cells through the NK synapse. NK cell in turn produces _________, a type II interferon that activates macrophages to increase phagocytosis and produce more cytokines.

A) What type of cells express pattern recognition receptors (PRRs)? B) What is the primary role of PRRs in early host defense?

Which of the following is false regarding MHC molecules?