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Basophils is not Phagocytic

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12y ago

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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.


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.


Which cell is known as antigen presenting cell?

Dendritic cells,macrophages, B 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.


Which of the foefollowing not considered an antigen-presenting cell?

Antigen-presenting cells (APCs) primarily include dendritic cells, macrophages, and B cells, which play crucial roles in the immune response by processing and presenting antigens to T cells. Cells such as red blood cells (erythrocytes) are not considered APCs, as they lack the necessary machinery to present antigens to T cells. Therefore, any cell type that does not have the capability to process and present antigens would not be classified as an antigen-presenting cell.


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.


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.


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.


Is neutrophils an antigen presenting cell?

Neutrophils are primarily known as phagocytic cells that play a key role in the innate immune response, but they are not considered classical antigen-presenting cells (APCs) like dendritic cells, macrophages, or B cells. However, neutrophils can exhibit some antigen-presenting capabilities, especially during inflammatory responses, by processing and presenting antigens to T cells. This function is not their primary role, and their effectiveness as APCs is generally lower compared to specialized APCs.


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.