During a primary humoral response to antigens all of the following occur exceptA) B cells may differentiate into plasma cells immediately.B) B cells may undergo several rounds of mitosis before producing plasma cells and memory cells.C) antibody levels do not peak until 1 to 2 weeks after the initial exposure.D) neutrophils invade the surrounding areas, releasing chemotactic substances.E) the first immunoglobulins to appear in circulation are of the IgM type
The answer is A) B cells may differentiate into plasma cells immediately
The answer is A) B cells may differentiate into plasma cells immediately.
During a primary humoral immune response to antigens, several events take place. First, B cells, which are specialized white blood cells, recognize the specific antigen through their antigen receptors. This recognition triggers the activation and proliferation of the B cells.
B cells can undergo several rounds of mitosis (cell division) during the primary immune response. This rapid division allows for the production of a large number of B cells that are specific to the antigen. Some of these B cells differentiate into plasma cells, which start producing and secreting antibodies specific to the antigen.
Antibody levels do not peak until 1 to 2 weeks after the initial exposure. This delay is because it takes time for the B cells to undergo mitosis, differentiate into plasma cells, and for the plasma cells to start producing antibodies in sufficient amounts.
Neutrophils, a type of white blood cell, do invade the surrounding areas during the immune response. They release chemotactic substances that attract other immune cells to the site of infection or antigen exposure.
The first immunoglobulins, or antibodies, to appear in circulation during the primary immune response are of the IgM type. IgM antibodies are produced by plasma cells and are the first line of defense against the antigen.
Therefore, the correct answer is A) B cells may not differentiate into plasma cells immediately during a primary humoral response to antigens.
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