Lymphatic Nodules and Lymph Nodes Quiz

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Which lymphoid organ serves as the site for T lymphocytes maturation?

Bone marrow

Tonsil

Thymus (correct)

Spleen

What is the function of HEVs (high endothelial venules) in the lymphatic system?

Producing antibodies

Regulating blood cell production

Clearing pathogens from the bloodstream

Transporting lymphocytes into lymph nodes (correct)

What is the clinical significance of DiGeorge Syndrome in relation to the lymphatic system?

Decreased platelet count

Impaired maturation of B lymphocytes

Defective T lymphocyte development (correct)

Reduced production of red blood cells

Which structure is a part of MALT (mucosa-associated lymphoid tissue)?

Peyer's patches (D) Signup and view all the answers

What is the primary function of stave cells in the spleen?

Filtration of blood (D) Signup and view all the answers

Which cells are responsible for presenting thymic antigens to immature lymphocytes during positive selection?

Type II epithelioreticular cells (D) Signup and view all the answers

What is the main function of Hassall's corpuscles in the thymus?

Production of T cell maturation hormones (C) Signup and view all the answers

What is the primary reason for the absence of reticular fibers in the thymus?

To prevent the infiltration of blood-borne antigens (C) Signup and view all the answers

Which type of epithelioreticular cells form Hassall's corpuscles in the thymus?

Type VI (B) Signup and view all the answers

What is the main purpose of the blood-thymus barrier?

To maintain a privileged area for T cell development (D) Signup and view all the answers

Where do T lymphocytes migrate after leaving the high endothelial venule (HEV)?

Inner cortex (B) Signup and view all the answers

What is the function of the splenic pulp's white pulp?

Designed to facilitate immune responses (C) Signup and view all the answers

What appears due to the proliferation of B lymphocytes in the splenic pulp?

Germinal center (C) Signup and view all the answers

What is the function of stave cells in the red pulp of the spleen?

Phagocytose old red blood cells (C) Signup and view all the answers

Which model of blood circulation does the spleen follow based on experimental and morphologic evidences?

Open circulation (B) Signup and view all the answers

Where are high endothelial venules (HEVs) mainly located?

Spleen (B) Signup and view all the answers

What is the function of the appendix?

The exact function is unclear (D) Signup and view all the answers

Where are microfold (M) cells mainly found?

Peyer’s patches (D) Signup and view all the answers

Which structure contains the mantles zone rich in T lymphocytes?

Lymphatic nodules (C) Signup and view all the answers

In which structure do lymphocytes circulate through high endothelial venules (HEVs)?

Lymph nodes (C) Signup and view all the answers