LAB Lymphoid organ and human WBCs

Primary lymphoid organs are responsible for ?

• Filtering blood

• Filtering lymph

• Storing lymphocytes

• Producing and maturing lymphocytes

Which of the following is NOT a secondary lymphoid organ?

• Spleen

• Tonsils

• Bone marrow

• Lymph nodes

Which lymphoid organ serves as a reservoir for blood and is involved in filtering blood and removing old or damaged blood cells?

• Thymus

• Lymph nodes

• Spleen

• Bone marrow

Which region of the thymus contains immature T cells undergoing maturation processes?

• Cortex

• Medulla

• Capsule

• Hilum

What is the function of M cells in Peyer's patches, and where can we find them on virtual slides?

• Produce antibodies/ jejunum of Human sec.

• Transport antigens from the gut lumen to underlying immune cells/Palatine tonsil of Human sec.

• Release cytokines/ Duodenum of Human sec.

• Phagocytose pathogens/Ileum of Human sec.

Which type of lymphoid organ is crucial for distinguishing between self and non-self antigens?

• Bone marrow

• Thymus

• Spleen

• Lymph nodes

What specific type of hematopoietic stem cells found in the bone marrow give rise to B cells?

• Lymphoid progenitor cells

• Myeloid progenitor cells

• Hemocytoblasts

• Colony-forming units

In the spleen, which region contains the marginal zone, where interactions between blood-borne antigens and immune cells primarily occur?

• Red pulp

• White pulp

• Capsule

• Capsule

Which specialized cells within the lymph nodes present antigens to T cells, initiating an adaptive immune response, and where can we find them on virtual slides?

• Macrophages, Blood of human smear

• Dendritic cells, Skin of Human

• Neutrophil, Colon of Human sec.

• Mast cells, Lymphoid node of Human sec.

Which of the following is NOT a function of lymphoid organs?

• Antigen presentation

• Hematopoiesis

• Phagocytosis

• Immune cell activation