T killer cells get activated only after a signal from Helper T cells

True

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False

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Solution

The correct option is A
True

T cells are responsible for the cell mediated immunity. There are two types of T cells, T killer and helper T cells, each having a specific function. Helper T cells bind to macrophages that display nonself proteins on their surface . As they bind they start to divide and release chemicals- typically cytokines, that activate the T killer cells to attack.

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Similar questions

State whether true or false:
T killer cells get activated only after a signal from helper T cells.

Arrange in order of action.

(i) Activation of helper T cells

(ii) Release of cytokines

(iii) Activation of killer T cells

(iv) Release of perforins

(v) Bursting of infected cells

Select the correct option.

Statement 1: Allergens causes an exaggerated response of the immune system

Statement 2: Mast cells on exposure to allergens produce only histamines

Statement 3: When a body gets exposed to active microorganisms from nature it is called natural passive immunity.

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