What is Active immunity and Passive immunity ?
What is Active immunity and Passive immunity ?
$(1)$ When a host is exposed to antigens, which may be in the form of living or dead microbes or other proteins, antibodies are produced in the host body.
This type of immunity is called active immunity.
$-$ Active immunity is slow and takes time to give its full effective response.
Injecting the microbes deliberately during immunization or infectious organisim gaining access in the body during natural infection induce active immunity.
$(2)$ When ready-made antibodies are directly given to protect the body against foreign antigens/agents. It is called passive immunity.
The yellowish fluid colostrum secreted by mother during initial days of lactation has abundant antibodies $(IgA)$ to protect the infants.
The foetus also receives some antibodies $(IgG)$ form the mother, through placenta during pregnancy.
Similar Questions
Match the following columns
Column $-I$
Column $-II$
$(A)$ Physical barriers
$(1)$ Interferon
$(B)$ Physiological barriers
$(2)$ Leukocytes
$(C)$ Cellular barriers
$(3)$ Tears
$(D)$ Cytokinin barriers
$(4)$ skin
$A$ $B$ $C$ $D$
Match the following columns
| Column $-I$ | Column $-II$ |
| $(A)$ Physical barriers | $(1)$ Interferon |
| $(B)$ Physiological barriers | $(2)$ Leukocytes |
| $(C)$ Cellular barriers | $(3)$ Tears |
| $(D)$ Cytokinin barriers | $(4)$ skin |
$A$ $B$ $C$ $D$
Assertion : Organ transplantation patients are given immunosuppressive drugs.
Reason : Transplanted tissue has antigens which stimulate the specific immune response of the recipient.
Assertion : Organ transplantation patients are given immunosuppressive drugs.
Reason : Transplanted tissue has antigens which stimulate the specific immune response of the recipient.
- [AIIMS 2005]
What plays an important role in primary and secondary response?
What plays an important role in primary and secondary response?
Choose the true statements
$I.$ Innate immunity is accomplished by providing different types of barriers
$II.$ Acquired immunity is present from the birth and is inherited from parents
$III.$ Sweat, tears, acid in the stomach and saliva prevent microbial growth
Choose the true statements
$I.$ Innate immunity is accomplished by providing different types of barriers
$II.$ Acquired immunity is present from the birth and is inherited from parents
$III.$ Sweat, tears, acid in the stomach and saliva prevent microbial growth
Select the incorrect statement with respect to acquired immunity.
Select the incorrect statement with respect to acquired immunity.
- [NEET 2022]