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QUESTION 41 Which cells produce plasma cells that secrete antibodies? O reticular cells macrophages O dendritic cells Tlympho
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41. e) B lymphocytes.

Plasma cells arise from antigen-activated B cells in secondary lymphoid organs such as the spleen and lymph nodes.

The main role of B lymphocytes are production of humoral antibodies such as IgG, IgA, IgM, IgD, IgE.

42. b) Zona glomerulosa, zona fasciculata, zona reticularis.

43. b) individuals with type O blood group have anti-A and anti-B agglutinins.

Individuals with type O blood group have no antigens present on their RBC surface. So, according to Landsteiner's 1st law anti-A and anti-B antibodies should must be present in the blood plasma.

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