Where are all undifferentiated lymphocytes produced?

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Study for the Stevens Immunology-Serology Test. Explore flashcards and multiple choice questions with detailed explanations and hints. Get exam ready now!

Multiple Choice

Where are all undifferentiated lymphocytes produced?

Explanation:
The production of lymphocytes starts in the bone marrow. Hematopoietic stem cells in the bone marrow give rise to common lymphoid progenitors, which then differentiate into lymphocytes. B cells complete their maturation in the bone marrow, while T cell precursors migrate to the thymus to mature there. The thymus is a maturation site for T cells, not a production site for undifferentiated lymphocytes. Spleen and lymph nodes are secondary lymphoid organs where mature lymphocytes reside and respond to antigens, not where undifferentiated cells are produced. Therefore, all undifferentiated lymphocytes originate in the bone marrow.

The production of lymphocytes starts in the bone marrow. Hematopoietic stem cells in the bone marrow give rise to common lymphoid progenitors, which then differentiate into lymphocytes. B cells complete their maturation in the bone marrow, while T cell precursors migrate to the thymus to mature there. The thymus is a maturation site for T cells, not a production site for undifferentiated lymphocytes. Spleen and lymph nodes are secondary lymphoid organs where mature lymphocytes reside and respond to antigens, not where undifferentiated cells are produced. Therefore, all undifferentiated lymphocytes originate in the bone marrow.

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