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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. GALT (Gut-Associated Lymphoid Tissue) refers to lymphoid tissue found in the gastrointestinal tract, not a part of the lymph node.
B. The hilum is the indented area of a lymph node where blood vessels, nerves, and efferent lymphatic vessels (which carry lymph out of the node) exit the node.
C. Buboes are swollen lymph nodes, often a sign of infection like bubonic plague, not the area where vessels exit the lymph node.
D. Filariae are parasitic worms that can cause lymphatic filariasis, but they are not related to the structure of a lymph node.
Correct Answer is C
Explanation
A. Lymph from the lower body drains into the thoracic duct.
B. Lymph from the left side of the head drains into the thoracic duct as well, which eventually empties into the systemic circulation.
C. Lymph from the right arm does not enter the thoracic duct. It drains into the right lymphatic duct, which then empties into the systemic circulation.
D. Lymph from the left arm drains into the thoracic duct along with lymph from other parts of the body.
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