What is opsonization, and which antibodies have opsonizing activity?

Antigen ________ is a scenario in which pathogen antigens resemble host antigens. Antigen ________ is a scenario in which the pathogen changes its antigens. These are just a couple of ways that pathogens may avoid host immune system detection.

____________ active immunity creates ____________ lymphocytes that will remember a pathogen and quickly respond to the same pathogen later when exposed.

The distinct feature of an antigen that stimulates an adaptive immune response is called a(n) ________________.

Select all the false statements about artificially acquired immunity.

a. It can be passive

b. It can be active

c. It may be generated by vaccines

d. It is a form of autoimmunity

e. It may generate memory cells

f. An example includes the transfer of antibodies across the placenta

Why is a second signal useful in T cell activation?

Match the cell to its stated feature. Some features will be assigned more than once.