Exam 29: Immune Mechanisms

Self- reactive T cells are eliminated during the development of tolerance in the immune system.

In the adaptive immune response, effective immunity cannot be detected for several days after the first contact with the pathogen.

Dimers of IgA are present in

Haptens cannot bind to or induce an immune response but can bind to antibodies.

The deactivation of NK cells due to binding of NK receptors to MHC I proteins is called__________.

The most common circulating antibody, comprising about 80% of the serum immunoglobin, is

Organisms such as Streptococcus pyogenes and Staphylococcus aureus, major leukocidin producers, are called ___________ pathogens.

T cells recognize antigens with their

How is immune memory beneficial to a host organism?

Plasma cells usually live for about one

The adaptive immune response, as compared to the innate response, takes longer to provide effective immunity.

The inducing antigens that react with an antibody are called heterologous antigens.

Which property characterizes adaptive immunity but NOT innate immunity?

Extremely high or low doses of an immunogen may suppress a specific immune response by stimulating the development of__________ .

Some intracellular pathogens produce phagocyte- killing proteins called ___________, which kill a phagocyte after ingesting the pathogen.

Which of the following is a function of dendritic cells?

TCRs recognize epitopes only after the immunogens have been partially degraded.

The antigen that induces an antibody or TCR is called the ___________.

The first cell type active in the innate response is usually a(n)__________.

Nonencapsulated strains of Streptococcus pneumoniae are highly virulent.