Questions tagged [immune-system]

This tag is for general questions related directly or indirectly to the vertebrate immune system, but are not questions directly related to Immunology, the discipline of the study of the immune system.

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4
votes
2answers
685 views

Do intestinal flora have the same DNA as their host?

Please bear with me, this is not my professional field and I might be mixing things up. In an explanation why seeds won't start growing in one's intestines, the explanation given was that foreign ...
54
votes
2answers
11k views

What is the benefit of fever during infections?

When people get sick, they often develop a fever. What is the effect of an increased body temperature on viruses and bacteria in the body? Is it beneficial to the infected body? Importantly, often ...
6
votes
1answer
310 views

Immune System - B-cell receptors

How do the B-cells, which are a part of our body, develop antibodies against antigens of the outside world (outside of our body), which they don't even know about? Is it just a random match?
5
votes
1answer
146 views

What is the purpose of requiring two separate binding systems for the antibody response?

I've read that in most cases, B-cell activation requires helper T-cells. This requires antigen binding by both antibodies and T-cell receptors, using two different antigen-binding proteins, ...
3
votes
1answer
177 views

How do memory cells(B-cells) encounter pathogens?

From what I understand, once the infection is handled, some of the B cells capable of producing the correct antigens are stored for the long-term in the lymph nodes. They will start multiplying again ...
8
votes
2answers
1k views

Why Can't The Immune Systems of Uncontacted Tribes Handle Our Common Colds?

I'm sorry if this is a stupid question, I'm just starting my first year of a biomedicine degree and I'm curious - googling didn't find me any answers. I know that the Aboriginal Australians and many ...
1
vote
1answer
163 views

CD4+ as Monocytes cell surface receptors

Today in class, our teacher was discussing about the pathogenecity of the HIV virus. He said that the binding between HIV virus and macrophages is done by the interaction between the GP120 of the ...
0
votes
1answer
65 views

What is the length and number of the parts of a conformational epitope?

I am interested in the question whether exposure to protein A might create antibodies that also bind to protein B. I am wondering whether, if the antigen of protein A is a conformational epitope, it ...