TrueFalse Secondary lymphoid organs are involved in both pri

True/False. Secondary lymphoid organs are involved in both primary and secondary immune responses, while primary lymphoid organs are not.

Solution

The statement is true.

Explanation: The secondary lymphoid organs are involved in both primary and secondary immune responses. This is because secondary lymphoid organs such as Peyer\'s patches, tonsils, skin etc are directly involved in primary immune response and first line of body defence by secreting mucin, mucus, degradative fluids, enzymes etc. Also, secondary lymphoid organs such as lymph nodes and spleen are also involved in second line of body defence by generation of immune cells.

On the other hand, primary lymphoid organs are involved in only generation of immune cells, clonal selection etc. Thus, they are not involved in primary and secondary immune responses.