Assertion : Interferons are a type of antibodies produced by body cells infected by bacteria.
Reason : Interferons stimulate inflammation at the site of injury.

If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion

If both Assertion and Reason are true but the Reason is not the correct explanation of the assertion

If Assertion is true but Reason is false

If both Assertion and Reason are false

Solution

If both Assertion and Reason are false

Interferons are not antibodies. These are natural proteins produced by the cells of the immune systems of most animals in response to challenges by foreign agents such as viruses, bacteria, parasites and tumor cells.

They belong to a large group of proteins known as cytokines. These are of 3 types:- $α$ , $β$ and $γ$ . Alpha and Beta interferon are produced by many cell types such as T- cells and B- cells and are important component of the antiviral response. They stimulate both macrophages and NK (Natural Killer) cells.

Inflammation is the first response to infection and injury and is critical to body defence. Basically, it is an attempt by the body to restore and maintain homeostasis after injury. It is the influx of fluid and cells that results in redness, swelling, heat, and pain at the infection site.

Some More Questions From Human Health and Disease Chapter

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Human Health And Disease

Some More Questions From Human Health and Disease Chapter

Out of four species of malaria which is most serious ?

Name the vector of malaria.

Write the causative agent of (i) amoebiasis and (ii) ascariasis.

Name the disease caused by Wuchereria bancrofti.

List three fungal genera which cause ringworm.

List two symptoms of ring worm.

Name the two wide spread diseases caused by Aedes mosquitoes.

Name the primary lymphoid organs.

What is the protein produced by B-cells called?

Which type of immune response does T-cells mediate?

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