AIDS is due to:
Correct answer: A. Deficiency of T lymphocytes
- A. Deficiency of T lymphocytes
- B. Bacterial infection
- C. Deficiency of riboflavin
- D. High blood pressure
Explanation
The deficiency of CD4+ T lymphocytes during HIV infection occurs through multiple mechanisms. HIV specifically targets CD4+ T cells by binding to the CD4 receptor and co-receptors on their surface, entering the cells, and replicating, which eventually causes the infected cells to lyse and die. Additionally, uninfected CD4+ T cells may undergo apoptosis due to chronic immune activation and viral protein toxicity. The virus also damages lymphoid organs like lymph nodes and the thymus, impairing T cell production and maturation, while some infected cells are destroyed by cytotoxic CD8+ T cells. Together, these processes lead to a progressive loss of CD4+ T cells, weakening the immune system and resulting in the immunodeficiency characteristic of AIDS.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
Practise Biodiversity and Variety of Life
3,130 free Biodiversity and Variety of Life MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.