Which of the following describes an activity of B cells?
Suppression of the immune response
Manufacture of antibodies
Phagocytosis
Direct destruction of foreign cells
The Correct Answer is B
A. Suppression of the immune response is primarily carried out by regulatory T cells, not B cells.
B. B cells are responsible for the production of antibodies. When activated, they differentiate into plasma cells, which secrete antibodies that target specific antigens (pathogens).
C. Phagocytosis is mainly performed by macrophages and neutrophils, not by B cells.
D. Direct destruction of foreign cells is a function typically carried out by cytotoxic T cells, not B cells.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","D"]
Explanation
A. Transfer through the placenta or breast milk is a form of naturally acquired passive immunity, where antibodies are passed from mother to child without the child's immune system having to produce them.
B. Inflammation is part of the innate immune response and not related to passive immunity.
C. Vaccination with an antigen involves stimulating the body to produce its own immune response, which is active immunity, not passive.
D. Administration of antiserum provides artificially acquired passive immunity, where pre-formed antibodies are given to an individual for immediate protection.
E. Tears and saliva are part of the innate immune system (first line of defense) and are not considered forms of passive immunity.
Correct Answer is A
Explanation
A. GALT stands for Gut-Associated Lymphoid Tissue, which refers to lymphoid tissue found in the gastrointestinal tract, including structures like Peyer's patches and the appendix, that play a role in immune defense.
B. Lacteals are specialized lymphatic capillaries found in the small intestine, responsible for absorbing digested fats, not lymphoid tissue.
C. Kupffer cells are macrophages located in the liver, responsible for filtering the blood, not in the gastrointestinal tract.
D. MALT stands for Mucosa-Associated Lymphoid Tissue, which refers to lymphoid tissue found in mucosal membranes throughout the body, including the gastrointestinal tract, but GALT is the specific term for lymphoid tissue in the gut.
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