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Antigen-Presenting Cells (APCs) in Immune Response

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Antigen-Presenting Cells (APCs) in Immune Response

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Questions and Answers

Which immune cells process and present antigens to T cells?

B cells and T cells

Epithelial reticular cells and endothelial cells

Macrophages and dendritic cells (correct)

Lymphocytes and fibroblasts

What is the primary function of cytokines?

To activate and differentiate immune cells (correct)

To recognize and respond to antigens

To engulf and digest foreign substances

To produce antibodies against pathogens

Which type of cytokine is produced by lymphocytes?

Interleukins

Chemokines

Monokines

Lymphokine (correct)

What is the main function of chemokines?

To induce the attraction of leukocytes to sites of inflammation Signup and view all the answers

Which cell type manufactures and releases cytokines, similar to T-helper cells?

Antigen-Presenting Cells (APCs) Signup and view all the answers

What type of cytokine is produced by any cell infected by viruses?

Interferons Signup and view all the answers

What is the primary function of TC cells?

To recognize antigens associated with MHC-I on the surface of other cells Signup and view all the answers

What is the role of CD markers on T cells?

To recognize the type of HLA (MHC) on the displaying cell surface Signup and view all the answers

What type of cells are responsible for killing virally and tumor-transformed cells as well as bacteria, parasites, and fungi?

Natural Killer Cells Signup and view all the answers

What is the process by which most natural antigens are processed?

Antigen processing by APCs Signup and view all the answers

What is the function of surface immunoglobulins (SIGs) on B cells?

To recognize specific antigens Signup and view all the answers

What type of cells undergo transformation to form plasma cells and B memory cells?

B cells Signup and view all the answers

What is a function of tumor necrosis factor?

Stimulates the expression of adhesion molecules Signup and view all the answers

What is the role of opsonization in the immune response?

To prepare bacteria to attach more easily to macrophages Signup and view all the answers

What is the function of the thymic cortex?

To provide a site for the maturation of T lymphocytes Signup and view all the answers

What is the purpose of the blood-thymus barrier?

To prevent the developing T cells from contacting blood-borne antigens Signup and view all the answers

What type of capillaries are found in the thymic cortex?

Continuous Signup and view all the answers

Why are self-macromolecules permitted to cross the blood-thymus barrier?

To eliminate those T cells that are programmed against self-antigens Signup and view all the answers