Question

Active immunity means
A. Resistance developed before disease
B. Resistance developed after disease
C. Increased heart beat
D. Increased flow of blood

Answer 1

Immunity is the ability of the body that simply defends itself against various infectious diseases and protects the cell and system of different processes of the body. It is the defence system of the body. If the immunity of a person is strong enough then he can be considered enough to be able to prevent the disease.

Complete step by step answer: Immunity can be described as the ability of the body to protect itself from infectious diseases, pathogens and parasites. The immune system forms the natural defence system of the body to defend it due to some pathogenic conditions arising due to foreign materials or microbes. Immunity can be present in two forms which are innate immunity and adaptive immunity.
Innate immunity is the type of immunity which is naturally occurring or can be also described as the genetic immunity and the organism obtains this immunity by birth. This type of immunity is encoded in one’s genes. Innate immunity has two major factors. One is external defences which include skin, tears, and stomach acid. It is the first line of defence. The other factor is internal defences which include inflammation and fevers. It is the second line of defence.
Adaptive immunity is the third line of defence which is also called acquired immunity. This type of immunity protects an organism from a specific pathogen. Adaptive immunity is further divided into two subcategories which are active immunity and passive immunity.
Active immunity is the formation of immunity or resistance formed after exposure to an antigen. These antibodies are produced by the recipient and these are stored permanently for the activation of memory cells that acknowledge the same antigen in the future and destroy them.
This type of immunity also can be produced naturally. It occurs when a person receives a microbe or other antigen and the person has not yet come into contact with the microbe and there are no pre-made antibodies for defence. In that case, the immune system finally produced antibodies for the microbe. This process is very slow.
Therefore, the correct option is option B.

Note: Immunity is the resistance power of the body against the disease and infections. It can be obtained by either naturally or through the vaccination. In the case of active immunity, it is obtained after the disease. In these cases, the antigens are produced by the recipient and stored permanently. It is the résistance of the body developed in response to exposure to pathogens.