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प्रश्न
What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?
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उत्तर
- After entering the body of an infected person, the AIDS virus enters the macrophage.
- Here, its RNA genome is copied into viral DNA by the reverse transcriptase enzyme, which then integrates into the cell’s DNA and directs the formation of virus particles in the infected cells.
- The macrophage continues to produce the virus and acts as a production factory for HIV.
- HIV enters the helper T-lymphocyte, replicates itself, and produces progeny viruses.
- The progeny viruses present in the blood attack other helper T-lymphocytes.
- This process is repeated again and again, as a result of which the number of T-lymphocytes in the infected person’s body continues to decrease.
- The patient continuously suffers from fever and diarrhoea; weight keeps decreasing, and the patient’s immunity becomes so low that he is unable to fight these types of infections.
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संबंधित प्रश्न
Correct the following statement:
All sexually transmitted diseases are completely curable.
Sketch and Label the 'Structure of HIV'.
Expand the STD
Write the full form of the following as it occur in biology :
AIDS
What does the abbreviation AIDS stand for?
AIDS is not transmitted by contact with a patient’s clothes.
Communicable: AIDS: Non communicable: ______.
What are the various routes by which transmission of human immunodeficiency virus takes place?
Higher Order Thinking Skill (HOT)
A leading weekly magazine has recently published a survey analysis which says that number of AIDS patient in the country is increasing day by day. The report says that the awareness among the people about AIDS is still very poor. You are discussing the magazine report in your class and a team of your class decides to help people to fight against the dreadful disease.
- What problem you face when trying to educate the people in your village near by your school?
- How do you overcome the problem?
Value based question
How can informational efforts change people’s HIV knowledge and behaviour?
Describe the major STDs and their symptoms.
Gonorrhoea is generally treated using ______.
From the sexually transmitted diseases mentioned below, identify the one which does not specifically affect the sex organs ______.
Which of the following is correct regarding HIV, hepatitis B, gonorrhoea, trichomoniasis?
Confirmatory test for STDs is ______.
Which of the following STDs are not completely curable?
Which of the following represents the correct match of a sexually transmitted disease with its pathogen?
Hepatitis-B, AIDS and genital herpes are the STDs that can be cured.
Both sickle cells anaemia and Huntington chorea are:
Veneral diseases can spread through:
- Using sterile needles
- Transfusion of blood from an infected person
- Infected mother to foetus
- Kissing
- Inheritance
Choose the correct answer from the options given below.
STDs are a threat to reproductive health. Describe any two such diseases and suggest preventive measures.
Explain the principle on which the AIDS diagnostic test works.
Chancre are the primary lesions caused by______.
The following is well-known abbreviation, which have been used in this chapter. Expand to its full form:
NACO
Which of the following is classified as a Gram-negative bacterium that causes gonorrhoea?
Treponema pallidum, the causative agent of syphilis, belongs to which bacterial morphological classification?
What are the characteristic symptoms of Hepatitis B infection?
What complication of Trichomonas vaginalis infection relates to pregnancy?
What does the Hepatitis B vaccine (3-dose course) provide?
