Question

Bursa fabricius is an important organ of birds. This organ is associated with
A. Generation of basophil
B. Production of uric acid
C. Metabolism of fatty acids
D. Generation of B-cell

Answer 1

Hint: In birds, the bursa fabricius is the site of hematopoiesis, where blood cells of birds form or The bursa is an epithelial and lymphoid organ that is found only in birds, which form immune cells in the birds.

Complete answer:
The bursa is an epithelial lined lymphoid organ that forms immune cells of the birds. The interior surface of the bursa is folded with 15 primary and 7 secondary folds. These plicae contain bursal follicles having follicle-associated epithelial cells, lymphocytes, macrophages, and plasma cells. In the bursa, these stem cells have characteristics of mature, immunocompetent B cells. These lymphoid stem cells form in the liver of birds during ontogeny. These lymphoid cells migrate from the fetal liver to the bursa fabricius. When the bird matures, bursa activate to form and release B-cells.

So, we have four options, Generation of basophil, Production of uric acid, Metabolism of fatty acids, Generation of B-cell. As we know, Bursa fabrics form immune cells or B-lymphocytes.

Hence, the correct answer is option (D).

Additional information:
The main functions of B-cell are:
- They form antibodies against the antigen.
- They perform as ankhen representing cells.
- They evolve into memory B-cell after activation by antigen.

Note: The bursa fabricius is active in young birds and forms B- lymphocytes while in humans, B-lymphocytes are formed in bone marrow and mature in secondary lymphoid organs. Bursa fabricius atrophies in birds after about six months.