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 A
Explanation
A. Hodgkin disease (also known as Hodgkin lymphoma) is a type of cancer that originates in the lymph nodes. It is characterized by the presence of Reed-Sternberg cells, a specific type of abnormal cell found in the lymphatic tissue.
B. Benign tumors of the spleen are not associated with Hodgkin disease.
C. A malignant tumor of the spleen refers to cancers like splenic lymphoma or metastasis from other organs, but this is not Hodgkin disease.
D. A benign tumor of the lymph nodes is not the correct description for Hodgkin disease, as it is a malignant (cancerous) condition.
Correct Answer is A
Explanation
A. Lacteals are specialized lymphatic capillaries located in the villi of the small intestine. They absorb digested fats (in the form of chylomicrons) and transport them into the lymphatic system, eventually entering the bloodstream.
B. Peyer patches are clusters of lymphoid tissue found in the small intestine, important for immune surveillance, but they are not involved in fat absorption.
C. Kupffer cells are specialized macrophages in the liver that filter blood, not involved in lymphatic fat transport.
D. Lymph capillaries generally collect interstitial fluid to form lymph, but lacteals are the specific type of lymph capillary responsible for absorbing dietary fats.
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