Question

Which of the following cells is infected by the HIV virus?
A. Complement cells
B. Red blood cells
C. T -killer cells
D. T -helper cells
E. All of the above

Answer 1

Hint: HIV (Human Immunodeficiency Virus) is a virus that attacks the body's immune system. It is transmitted via body fluids like semen, vaginal discharge or blood.

Complete answer:
- The complement system is a part of the immune system that enhances the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism. It promotes inflammation and attacks the pathogen's cell membrane.
- Red blood cells are an important component of blood. It transports oxygen to the body's tissues in exchange for carbon dioxide, which is carried to and eliminated by the lungs. Red blood cells are formed in the red bone marrow of bones. Therefore, this is an incorrect option.
- T -killer cells are the major components of the adaptive immune system. It directly kills infected host cells, activating other immune cells, producing cytokines, and regulating the immune response.
- T -helper cells also known as CD4 cells are white blood cells that protect our body from infection. These are white blood cells that fight infection and play an important role in our immune system. A CD4 count is used to check the health of the immune system in people infected with HIV (human immunodeficiency virus). Helper T cells important cells in adaptive immunity because they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. HIV attacks and destroys CD4 cells.

Hence the correct answer is option D.

Note: It is to be noted that HIV destroys CD4 cells by using their replication machinery to create new copies of the virus. It leads to swelling and bursting of the CD4 cells to When the virus has destroyed a certain number of CD4 cells and the CD4 count drops below 200, a person will be said to have progressed to AIDS.