Immune System Components Quiz

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Which gland is responsible for producing the hormone thymosin?

Lymph nodes

Thymus (correct)

Bone marrow

Spleen

Where do T and B lymphocytes travel to after maturing in the thymus and bone marrow?

Lymph nodes (correct)

Spleen

Kidney

Liver

Where is the spleen located?

Behind the sternum

Behind the stomach (correct)

Under the diaphragm

Above the heart

Which cells secrete cytokines that help B cells differentiate into plasma cells?

Helper T cells Signup and view all the answers

What is the function of macrophages?

Engulf and digest cellular debris Signup and view all the answers

What happens when immature myeloid cells cannot differentiate into mature myeloid cells?

Expansion of myeloid-derived suppressor cells Signup and view all the answers

Which type of white blood cell is considered the first responder of the innate immune system?

Granulocytes Signup and view all the answers

What is the role of macrophages in the immune system?

Destroying damaged red blood cells Signup and view all the answers

Which lymphoid tissues are considered part of the immune system?

Lymph nodes and spleen Signup and view all the answers

What is the primary function of antigen-presenting cells (APCs)?

Presenting antigens to activate T and B lymphocytes Signup and view all the answers

Which type of hypersensitivity reaction is mediated by antigen-specific activated T-cells?

Type 4 hypersensitivity Signup and view all the answers

What is the main cause of hyperacute rejection in transplant recipients?

Preexisting antibodies against the graft Signup and view all the answers

Which type of hypersensitivity reaction involves the activation of T lymphocytes against donor MHCs in transplant rejection?

Type 4 hypersensitivity Signup and view all the answers

Which type of hypersensitivity reaction is characterized by the deposition of circulating antigen-antibody complexes in tissues?

Type 3 hypersensitivity Signup and view all the answers

What is the main manifestation of chronic rejection in heart transplants?

Accelerated atherosclerosis Signup and view all the answers

Which type of hypersensitivity reaction is mediated by IgE antibodies and mast cell degranulation?

Type 1 hypersensitivity Signup and view all the answers

What is the main cause of acute rejection in transplant recipients?

Activation of T lymphocytes against donor MHCs Signup and view all the answers

Which type of hypersensitivity reaction involves the destruction of cells by antibodies binding to the cell surface?

Type 2 hypersensitivity Signup and view all the answers

What is the main manifestation of chronic rejection in liver transplants?

Vanishing bile duct syndrome Signup and view all the answers

Which type of hypersensitivity reaction is characterized by systemic vasodilation, bronchoconstriction, and increased vascular permeability?