Antigen-antibody complex 

Antigen-antibody complex 

Question1

Activation of the classical pathway begins with:

Antigen-antibody complex

membrane attack complex

enzymes

target cell; opsonin; immune complexes

Question 2

Where are antibodies produced?

Helper T lymphocytes
Thymus gland
Plasma cells
Bone marrow

Question 3

What is the role of natural killer (NK) cells?

Elimination of malignant cells
Binding tightly to antigens