Question

B and T cells required for immune system are produced in -
a. Bone Marrow
b. Liver
c. Spleen
d. Lymph nodes

Answer 1

Hint: Chief cellular components of the adaptive immune response are the T cells and B cells. T cells are indulged in cell-mediated immunity, whereas B cells are chiefly accountable for humoral immunity (relating to antibodies). Each B cell and the T cell is definite for a particular antigen.

Complete answer:
> The acquired immunity includes two sorts of cells: B-cells and T-cells. T cells are engaged in cell-mediated immunity, whereas B cells are mainly responsible for humoral immunity (relating to antibodies). Like all blood cells, B-cells and T-cells are created in the bone marrow. B-cells mature in the bone marrow and T-cells pass through the bloodstream and mature in the thymus gland.

> Spleen’s chief function is to act as a cleaner for your blood. It recognizes and eradicates old, malformed, or damaged red blood cells.

> The liver processes this blood and ruptures down, balances, and forms the nutrients and also metabolizes drugs into forms that are easier to utilize for the rest of the body or that are non-toxic.

> Lymph nodes are minute structures that work as filters for destructive substances.
Hence B- and T-cells requisite for the immune system are created in Bone marrow.

So, the correct answer is option (A).

Note: Bone marrow stays red until around the age of 7 years, as the need for new constant blood formation is high. As the body ages, the red marrow is slowly replaced by yellow fat tissue. Adults have a typical weight of about 2.6 kg (5.7 lbs) of bone marrow, about partly of which is red. The bone marrow also forms and releases more white blood cells in retort to infections, and more platelets in response to bleeding.