Question

Bursa of Fabricius of birds is associated with
A. Generation of basophils
B. Generation of B-cells
C. Metabolism of fatty acids
D. Production of uric acid

Answer 1

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

Complete Answer:
The bursa is usually defined as 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 foetal liver to the bursa fabricius. When the bird matures, bursa activate to form and release B-cells.

Now let us find solution from given options:
- Generation of basophils: Basophils are the kind of blood cells. They are used to treat infections. These are kind of white blood cells. They are produced due to bone marrow.
- Generation of B-cells: The b cells generation is the main function of bursa. It is a necessary organ for the development of B - cells in birds. The bursa of fabricius is present in the cloaca of birds.
- Metabolism of fatty acids: When fatty acids are metabolised they get converted into fats and glycerol. This is usually concerned with the activity of bile mainly in the small intestine.
- Production of uric acid: Uric acid is a kind of nitrogenous waste. It is least toxic and requires very less amount of water. It is produced from the liver.

So, our required option is B that is Generation of B-cells.

Note: In mammals when compared to birds there is bone marrow present instead of bursa of fabricius which is responsible for the formation of blood cells and B - cells. B cells are also named as the b lymphocytes. B cells are the type and form of white blood cells. Their function is to perform secretion of antibodies which help in various immune reactions and provide immunity to a person or animal.