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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 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.
The immune cell that allows for subsequent recognition of an antigen resulting in a secondary response is called an?
Memory cell. Memory cells are a type of immune cell that remember specific antigens upon initial exposure, allowing for a faster and more effective response upon subsequent exposure to the same antigen.
Antigens cause immature B cells to?
When a B cell detects an antigen, it will engulf it and then display it on its cell surface with an MHC molcule. This antigen/MHC combination is then detected by a T cell - which will send signalling molcules to B cells to multiply and mature into plasma cells (which create antibodies against the antigen) and memory B cells (which 'remember' the antigen for next time).They become plasma cells
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.
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.
How does the F4 key work so it can absolute value?
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What do dendrictic cell do?
antigen processing and presentation
What occurs if a T cell binds to an antigen and the T cell does not receive a co-stimulatory signal?
The T cell enters a state of anergy. In this case, the T cell becomes tolerant to that antigen and is unable to divide or to secrete cytokines. This state of unresponsiveness to antigen is called anergy.
The genetic disorder sickle cell disease is an example of heterozygous dominance?
Sickle cell disease is an example of codominance, not heterozygous dominance. In individuals who are heterozygous for the sickle cell allele, they exhibit a milder form of the disease called sickle cell trait, which demonstrates codominance of the normal and mutant hemoglobin alleles.
What type of cell makes blood cells?
antigen
What happens when a B cell recognize an antigen?
When a B cell recognizes an antigen, it will undergo activation and differentiation into plasma cells, which produce antibodies specific to that antigen. Some B cells may also differentiate into memory cells that provide long-lasting immunity to the antigen. This process is essential in the adaptive immune response to eliminate pathogens and prevent future infections.
Which cell is known as antigen presenting cell?
Dendritic cells,macrophages, B cells
Where would a B cell not be likely to meet its antigen?
spleen
What Red blood cell antigen named after the rhesus monkey?
The red blood cell antigen named after the rhesus monkey is the Rh factor or Rh antigen. It is an important antigen in blood transfusions and plays a role in hemolytic diseases of the newborn when an Rh-negative mother carries an Rh-positive fetus.
What disease are you immune to if you are heterozygous for sickle cell disease?
malaria
When two different alleles occur in a cell?
A heterozygous condition.
