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What else can I help you with?
Which cell are presenting sea cell rhinitis?
There is no condition known as sea cell rhinitis, but there is seasonal rhinitis. One cell that is presenting in this condition is nasal mucosal antigen-presenting cell, or APC.
Is T cell activation antigen specific?
Yes. The first signal that a T cell receives from an antigen presenting cell (dendritic cell) is MHC presenting an antigen (foreign peptide). This gives the T cell specificity to this antigen.
What cell is not and antigen presenting cell?
Red blood cells are not antigen presenting cells because they lack major histocompatibility complex (MHC) molecules, which are required for presenting antigens to T cells.
What does not serve as an antigen-presenting cell?
Red blood cells do not serve as antigen-presenting cells. Antigen-presenting cells include dendritic cells, macrophages, and B cells, which play a crucial role in initiating immune responses by presenting antigens to T cells.
What signals does a t cell require in order to divide?
T cells require signaling through the T cell receptor (TCR) upon recognition of a specific antigen presented by antigen-presenting cells, as well as co-stimulatory signals from molecules like CD28 on the T cell and CD80/86 on the antigen-presenting cell. These signals are necessary for T cell activation and proliferation.
What group does the phagocytic antigen-presenting cell belong to?
Phagocytic antigen-presenting cells belong to the group of immune cells known as leukocytes or white blood cells. These cells engulf and digest pathogens and then present pieces of them to other immune cells to activate an immune response. Common phagocytic antigen-presenting cells include macrophages, dendritic cells, and some types of white blood cells.
The function of an antigen-presenting cell depends on the presence of what?
The function of an antigen-presenting cell depends on the presence of major histocompatibility complex (MHC) molecules, which provide a platform for presenting antigens to T cells. Additionally, the presence of co-stimulatory molecules is crucial for activating T cells and initiating an immune response.
How are antigens removed from bacteria?
Macrophages ( in the lymph nodes ) act like phagocytes to engulf and digest the pathogen. But they do not fully digest it. They separate out the antigens and incorporate them into a cell surface molecule. This is exposed on the surface of the macrophage, which becomes known as an antigen-presenting cell. Its function is to find the lymphocytes that can neutralise that particular antigen.
What are the double signals in T cell activation?
T cells receive 3 signals during activation:1. Major Histocompatibility Complex (MHC) presenting an antigen (foreign peptide) to the T cell receptor2. The co-stimulatory signal (B7 on the dendritic cell binding to CD28 on the T cell)The first signal ensures that the T cell is specific for the antigen it has been presented.The T cell cannot be activated without also recieveing the second signal. This is how the T cell checks that it has been presented an antigen by a "professional" antigen presenting cell.3. Cytokines (signalling molecules) are released by the dendritic cell - these cause the differentiation of the T cell
Do antigen presenting cells have major histocompatibility complex class I molecules?
Yes, antigen presenting cells have major histocompatibility complex class I molecules.
What activates a helper T-cell in the immune response process?
A helper T-cell is activated in the immune response process when it recognizes a specific antigen presented by an antigen-presenting cell. This interaction triggers the helper T-cell to release signaling molecules that coordinate and enhance the immune response.
What does a naive b cell do?
It hangs around in a lymph node until an 'antigen-presenting cell' comes and finds it, and then it starts producing antibodies specifically to 'hunt down' or stick to whatever protein it is that the antigen-presenting cell shows to it. Once it starts producing antibodies, it's then known as a plasma cell. Antigen-presenting cell = phagocytic or 'pacman-like' macrophage or neutrophil that has eaten evil stuff and keeps a trophy of it's kill on its cell surface to wave around like a flag as it returns from the site of an infection back to base camp (AKA: lymph nodes). My apologies for all the battle references, but I imagine the immune system and its functions in a very graphic, very action-movie kind of way. It's just too cool and complex not to.
