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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.
In indirect elisa the enzyme liked antibody will attach to?
In an indirect ELISA, the enzyme-linked antibody attaches to the target antigen that has been immobilized on the microplate. This allows for the detection of the antigen through the enzyme's activity, which produces a signal that indicates the presence of the target antigen in the sample.
Hemagglutination-inhibition test description?
It is the measures of the ability of soluble antigen to inhibit the agglutination of antigen-coated red blood cells by antibodies. In this test, a fixed amount of antibodies to the antigen in question is mixed with a fixed amount of red blood cells coated with the antigen (research on passive hemagglutination). Also included in the mixture are different amounts of the sample to be analyzed for the presence of the antigen. If the sample contains the antigen, the soluble antigen will compete with the antigen coated on the red blood cells for binding to the antibodies, thereby inhibiting the agglutination of the red blood cells.
What is a protein thatacts against a specific antigen?
An antibody is a protein that acts against a specific antigen by binding to it and marking it for destruction by the immune system. Antibodies are produced by B cells in response to the presence of foreign substances in the body.
In Blood type O what does selectogen negative mean?
Selectogen negative in blood type O refers to the absence of a specific antigen called the Selectogen antigen. This antigen is part of the Rh blood group system. Individuals who are Selectogen negative do not have this antigen on their red blood cells, while those who are Selectogen positive do have it.
What does the presence of the Rh antigen mean?
Rh antigen, which is also called D antigen, indicates if the blood type is positive or negative. The presence of this antigen indicates the patient is Rh positive, the absence of this antigen reflects a blood type of Rh Negative. For example, if a person is O Positive, the Rh antigen is present.
What is a nontreponemal antigen tests?
Nontreponemal antigen tests are used as screeners. They measure the presence of reagin, which is an antibody formed in reaction to syphilis.
In response to the presence of an antigen the body makes a specific blank?
antibody
What releases histamineand other mediators from basophils?
Due to antigen presence if sensitized by the IgE.
What is an anergy?
An anergy is a deficiency of energy, the presence of dilute energy, or the lack of immunity to an antigen.
What does active immunity?
the immunity that results from the production of antibodies by the immune system in response to the presence of an antigen.
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 does Active immunity means?
the immunity that results from the production of antibodies by the immune system in response to the presence of an antigen.
Why can a person of type A give to a person who is AB but not vice versa?
Because the immune system of anyone with type AB blood is used to the presence of both the A and the B antigen on red blood cells. Therefore it will not fight type A blood with the A antigen present. (The immune system never detects the lack of antigens, only their presence). On the other hand, a person with type A blood carries only the A antigen on the surface of their erythrocytes. Their immune system detects and fights the B antigen.
What is DU negative factor in blood?
Rh blood type is determined by the presence or absence of the D antigen. People who are Rh positive have the D antigen and those that are Rh negative lack this. Some people have a variant of the D antigen, called Du. Presence of Du antigen causes lab results to report the blood type as Rh negative, although the patient behaves as an Rh positive would. Du negative means a "true Rh negative" result.
What is a disease- fighting protein created by the immune system in response to the presence of specific antigen?
Antibody - produced by B lymphocytes.
Of the antigens in the rh group?
The most important antigens in the Rh group are the RhD antigen and the RhC, RhE, Rhc, and Rhe antigens. The RhD antigen is the most clinically significant, as the presence or absence of this antigen determines an individual's Rh blood type (positive or negative). These antigens are important in blood transfusions and can cause hemolytic disease of the newborn if not properly matched during pregnancy.
