The binding of C3b by CR1 on macrophages leads to:

Which control protein makes sure C3b is heavily deposited on the surface of pathogens?

Which lymphocyte has dark staining granules and is involved in allergic responses.

Which of the following is able to bind antigens?

A _____ immune response refers to when the immune system has its first encounter with a pathogen while a ________ immune response refers to the second or any subsequent time when the immune system encounters the same pathogen with the same antigens recognized in the first encounter.

Properdin increases complement activation by:

Which of the following are mechanisms the immune system uses to attack intracellular pathogen?

Effector T-cells include

The opsonin C3b on the surface of human cells binds to the complement receptor CR1 on the surface of the pathogen.

Upon antigen recognition, B-cells can differentiate into ______ and T-cells can differentiate into ______.