Which of the following is underdeveloped in patients with DiGeorge syndrome?

What type of organisms is a person susceptible to if they have splenic dysfunction?

Which of the following contains T cells and is located in white pulp?

Which of the following contains B cells and is located in white pulp?

Which of the following is the thymus derived from?

Which of the following does not enhance the activity of NK cells?

Which of the following helps B cells make antibodies and produce cytokines to recruit phagocytes and activate other leukocytes?

Which of the following directly kills virus infected and tumor cells via perforin and granzymes?

What is the process of T cell activation?

What is the process of B cell activation and class switching?

Which of the following is associated with an increased risk of SLE?

Which of the following is associated with an increased susceptibility to recurrent Neisseria infections?

Which of the following is associated with hereditary angioedema?

Which of the following is associated with complement mediated intravascular hemolysis and can cause atypical venous thrombosis?

Which of the following is associated with fever?

Which of the following stimulates T cells?

Which of the following stimulates bone marrow?

Which of the following stimulates IgE production?

Which of the following stimulates IgA production?

Which of the following stimulates APP production?

Which of the following activates endothelium, causes WBC recruitment, and causes vascular leak?

Which of the following is a major chemotactic factor for neutrophils?

Which of the following induces differentiation of T cells into Th1 cells and activates NK cells?

Which of the following is secreted by NK cells and T cells in response to antigen or IL-12 from macrophages; stimulates macrophages to kill phagocytosed pathogens, inhibits Th2 cells, and induces IgG isotype switching in B cells?