Question

13.what is the main function of T-
lymphocytes?
O
(a) detect self tissue from foreign
tissue
O (b) filtration
O (c)blood reservoir
O
(d)forms antibodies​

Answer 1

Answer:

The main function of T-lymphocytes is to (a) detect self tissue from foreign tissue.

Explanation:

• Lymph is a colourless or slightly, yellowish, alkaline fluid in lymphatic vessels. It contains a large number of leucocytes or lymphocytes in the majority.

• Thus lymphocytes are the white blood cells (WBCs) that have variable life spans. These are characterised by the presence of an intended nucleus. They play a key role in the immune response of the body.

• Thymus maturing lymphocytes are the T lymphocytes which act as killer or cytotoxic cells. They kill the pathogenic microorganisms and other foreign or alien cells entering the body.

• Our body possesses the phenomenon of self-tolerance. While undergoing maturation, these cells are trained in such a way that they can easily recognise and detect the body's cells.

• So whenever the cells lose the ability to self-tolerance, the body starts destroying its cells.

• While the B cells produce antibodies to recognise foreign substances i.e. antigens that are used to attack invading bacteria, viruses, and toxins by showing immune responses.

• The T cells distinguish the self or body tissues from the foreign tissues and destroy the body's cells that have themselves been taken over by viruses or become cancerous.

Hence option (a) detects self tissue from foreign tissue is correct.