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Biology
Human Health and Disease
121 questions from 38 papers, each with its answer.
- 121 questions
- 38 papers
- 3.43% of Biology
AIDS
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A certain patient is suspected to be suffering from Acquired Immuno Deficiency Syndrome. Which diagnostic technique will you recommend for its detection?AIDS is caused by the human immunodeficiency virus (HIV).
A widely used diagnostic test for AIDS is the enzyme-linked immunosorbent assay (ELISA), which is based on the antigen–antibody interaction and detects antibodies against HIV (or the viral antigens) in the blood.
A positive ELISA is confirmed by the Western blot test.
The Widal test is used for the diagnosis of typhoid.
MRI and ultrasound are imaging techniques for internal organs and cannot detect a viral infection.
Hence ELISA is recommended.
Innate immunity
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Which one of the following acts as a physiological barrier to the entry of microorganisms in human body?Innate immunity consists of four types of barriers: physical, physiological, cellular and cytokine barriers.
Physiological barriers: acid in the stomach, saliva in the mouth and tears from the eyes all prevent microbial growth.
Physical barriers: the skin and the mucus coating of the epithelium lining the respiratory, gastrointestinal and urogenital tracts.
Cellular barriers: leucocytes such as neutrophils (PMNL) and monocytes, natural killer cells and macrophages.
Hence tears act as a physiological barrier.
That is every question in Human Health and Disease for this filter.
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