Histology of Lymphoid Organs
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Questions and Answers

Which lymphoid organ is responsible for inducing central tolerance and preventing autoimmunity?

  • MALT
  • Spleen
  • Lymph Nodes
  • Thymus (correct)
  • What is the main function of the spleen?

  • Destruction of old erythrocytes
  • Development of plasma cells
  • Antigen presentation
  • Blood filtration (correct)
  • Which lymphoid organ has lymphoid nodules with germinal centers in both the cortex and medulla?

  • Thymus
  • Spleen
  • MALT (correct)
  • Lymph Nodes
  • Which lymphoid organ has a cortex rich in B cells organized around follicular dendritic cells?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ has a periarteriolar lymphoid sheath (PALS) surrounding a central arteriole?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ has a red pulp and a white pulp?

    <p>Spleen</p> Signup and view all the answers

    Which lymphoid organ has a subcapsular sinus that receives lymph from afferent lymphatics?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ has reticular fiber stroma to support lymphocytes, plasma cells, dendritic cells, macrophages, and other APCs?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ has a medulla that contains medullary cords and medullary sinuses?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ has a blood-thymus barrier and a corticomedullary barrier to prevent exposure of thymocytes to antigens?

    <p>Thymus</p> Signup and view all the answers

    Which of the following is NOT a key component of the immune system?

    <p>Tonsils</p> Signup and view all the answers

    Which lymphoid organ is responsible for the production and maturation of T cells?

    <p>Thymus</p> Signup and view all the answers

    What is the function of lymph nodes?

    <p>Filtration of lymph</p> Signup and view all the answers

    Which lymphoid organ is the largest in the human body?

    <p>Spleen</p> Signup and view all the answers

    Which non-encapsulated collection of lymphoid tissue is located in the appendix?

    <p>Peyer's patches</p> Signup and view all the answers

    What is the function of the thymus?

    <p>Maturation of T cells</p> Signup and view all the answers

    Which lymphoid organ is NOT encapsulated?

    <p>Tonsils</p> Signup and view all the answers

    Which lymphoid organ is responsible for the filtration of blood?

    <p>Spleen</p> Signup and view all the answers

    Which non-encapsulated collection of lymphoid tissue is located in the lining of the small intestine?

    <p>Peyer's patches</p> Signup and view all the answers

    Which lymphoid organ is responsible for the production of antibodies?

    <p>Spleen</p> Signup and view all the answers

    Which type of immunity develops slowly and is based on antigens being presented to lymphocytes in blood, lymph, epithelia, and connective tissues?

    <p>Adaptive immunity</p> Signup and view all the answers

    Which lymphoid organ is responsible for the development of T lymphocytes?

    <p>Thymus</p> Signup and view all the answers

    Which type of immunity involves physical barriers such as skin and mucous membranes to prevent infections or penetration of the host body?

    <p>Innate immunity</p> Signup and view all the answers

    Which type of cells destroy unhealthy host cells in innate immunity?

    <p>Natural killer cells</p> Signup and view all the answers

    Which type of immunity produces memory cells that allow a rapid response upon re-exposure to the same specific microbe?

    <p>Adaptive immunity</p> Signup and view all the answers

    Which type of cells are responsible for eliminating antigens in the cellular response of adaptive immunity?

    <p>T lymphocytes</p> Signup and view all the answers

    Which type of cells are responsible for producing antibodies in the humoral response of adaptive immunity?

    <p>B lymphocytes</p> Signup and view all the answers

    Which protein complex on the surface of antigen-presenting cells is responsible for presenting antigens to T cells?

    <p>MHC Class II</p> Signup and view all the answers

    Which type of lymphocytes assist with immune responses by producing cytokines to promote B cell differentiation, activate macrophages, and cytotoxic T lymphocytes?

    <p>Helper T cells (CD4)</p> Signup and view all the answers

    Where do we find lymphocytes?

    <p>All of the above</p> Signup and view all the answers

    Which lymphoid organ has a blood-thymus barrier and a corticomedullary barrier to prevent exposure of thymocytes to antigens?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ is responsible for the filtration of blood?

    <p>Spleen</p> Signup and view all the answers

    Which lymphoid organ has a cortex rich in B cells organized around follicular dendritic cells?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which non-encapsulated collection of lymphoid tissue is located in the lining of the small intestine?

    <p>Peyer's Patches</p> Signup and view all the answers

    Which lymphoid organ has a medulla that contains medullary cords and medullary sinuses?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ is responsible for the production and maturation of T cells?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ has a periarteriolar lymphoid sheath (PALS) surrounding a central arteriole?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ is responsible for the development of T lymphocytes?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ is responsible for the production of antibodies?

    <p>Spleen</p> Signup and view all the answers

    Which lymphoid organ is NOT encapsulated?

    <p>Tonsils</p> Signup and view all the answers

    Which lymphoid organ develops from endoderm?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ induces central tolerance and prevents autoimmunity?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ is responsible for the production and maturation of T cells?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ has a cortex rich in B cells organized around follicular dendritic cells?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ is NOT encapsulated?

    <p>MALT</p> Signup and view all the answers

    Which lymphoid organ has a blood-thymus barrier and a corticomedullary barrier to prevent exposure of thymocytes to antigens?

    <p>Thymus</p> Signup and view all the answers

    Which lymphoid organ has a medulla that contains medullary cords and medullary sinuses?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ has a subcapsular sinus that receives lymph from afferent lymphatics?

    <p>Lymph Nodes</p> Signup and view all the answers

    Which lymphoid organ has reticular fiber stroma to support lymphocytes, plasma cells, dendritic cells, macrophages, and other APCs?

    <p>Spleen</p> Signup and view all the answers

    Which lymphoid organ has a periarteriolar lymphoid sheath (PALS) surrounding a central arteriole?

    <p>Spleen</p> Signup and view all the answers

    Which type of lymphocytes are responsible for eliminating antigens in the cellular response of adaptive immunity?

    <p>T lymphocytes</p> Signup and view all the answers

    What is the function of the thymus?

    <p>Development and maturation of T cells</p> Signup and view all the answers

    Which lymphoid organ has a red pulp and a white pulp?

    <p>Spleen</p> Signup and view all the answers

    What is the function of lymph nodes?

    <p>Filtration of lymph</p> Signup and view all the answers

    Which type of immunity produces memory cells that allow a rapid response upon re-exposure to the same specific microbe?

    <p>Adaptive immunity</p> Signup and view all the answers

    Which lymphoid organ has reticular fiber stroma to support lymphocytes, plasma cells, dendritic cells, macrophages, and other antigen-presenting cells (APCs)?

    <p>Lymph nodes</p> Signup and view all the answers

    Which lymphoid organ has a subcapsular sinus that receives lymph from afferent lymphatics?

    <p>Lymph nodes</p> Signup and view all the answers

    Which protein complex on the surface of antigen-presenting cells is responsible for presenting antigens to T cells?

    <p>Major Histocompatibility Complex (MHC)</p> Signup and view all the answers

    Which type of immunity develops slowly and is based on antigens being presented to lymphocytes in blood, lymph, epithelia, and connective tissues?

    <p>Adaptive immunity</p> Signup and view all the answers

    Which type of immunity involves physical barriers such as skin and mucous membranes to prevent infections or penetration of the host body?

    <p>Innate immunity</p> Signup and view all the answers

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