Extra Credit Quiz 20 MHC In Depth

All nucleated cells contain ________. A) class I MHC B) secretory antibodies C) class II MHC D) IgE receptors E) IgM molecules

A) class I MHC

MHC molecules are found on each of the following cells except A) red blood cells. B) islet of Langerhans cells. C) leukocytes. D) eosinophils. E) epithelial cells

A) red blood cells.

During presentation of APC-bound antigen, macrophages and dendritic cells secrete the cytokine, ________, that activates T helper cells. A) interferon B) interleukin-1 C) histamine D) interleukin-2 E) None of the choices is correct.

B) interleukin-1

Class II MHC genes code for A) all HLA antigens. B) receptors located primarily on macrophages and B cells. C) certain secreted complement components. D) self receptors recognized by T lymphocytes. E) All of the choices are correct.

B) receptors located primarily on macrophages and B cells.

The histocompatibility complex proteins function in A) antibody proliferation. B) T-cell maturation. C) recognition of self. D) B-cell maturation. E) None of the choices is correct.

C) recognition of self.

Which lymphocytes lack specificity for antigen and are cells that attack cancer cells and virus-infected cells? A) helper T cells B) delayed hypersensitivity T cells C) suppressor T cells D) natural killer (NK) cells E) cytotoxic T cells

D) natural killer (NK) cells

Class I MHC genes code for A) all HLA antigens. B) certain secreted complement components. C) receptors located primarily on macrophages and B cells. D) self receptors recognized by T lymphocytes. E) All of the choices are correct.

D) self receptors recognized by T lymphocytes.

Antigen-presenting cells A) hold and present processed antigen on their cell membrane surface. B) include dendritic cells. C) engulf and modify antigen to be more immunogenic. D) include macrophages. E) All of the choices are correct.

E) All of the choices are correct.