The germinal center of a lymph node   a. Is the location of B cells undergoing clonal expansion   b. Is the location of plasma cells   c. Is the location of B cells that have not yet contacted their antigen   d. In a micrograph, Is the light-colored center of an activated lymphoid follicle

Imagine a person is born with a genetic mutation, that suppresses the production of  MHC I markers. What problems would that create for this person?

In which cells are the enzyme TdT actively functioning? (select all that apply) Select one or more: a. immature B cells b. plasma cells c. hematopoietic stem cells d. pro-B cells

For an autoimmune disease to occur, lymphocytes do not learn how to recognize foreign pathogens as dangerous and self-antigens as safe. What is the second thing that needs to happen specifically with lymphocytes to have an autoimmune disease? O a. Malfunctioning lymphocytes attach to macrophages O b. Malfunctioning lymphocytes are not destroyed by the body O c. Malfunctioning lymphocytes prevent normal lymphocytes from reproducing O d. Malfunctioning lymphocytes trigger the complement system to initiate an immune response

T cells failing to encounter specific antigen leave lymph nodes via the Select one: a. germinal center b. bloodstream c. high endothelial venules d. afferent lymph efferent lymph. e.