Multiple Choice
Large lymph capillaries in a lymph node spanned by crisscrossing reticular fibers are known as __________.
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20. The Lymphatic System
Secondary Lymphoid Organs: Lymph Nodes
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When B lymphocytes are dividing rapidly, the __________ of the lymphoid tissue enlarge(s).
A
germinal centers
B
reticular fibers
C
lymphoid nodules
D
diffused lymphoid tissue
Verified step by step guidance1
Understand the role of B lymphocytes in the immune system. B lymphocytes, or B cells, are a type of white blood cell that plays a crucial role in the adaptive immune response by producing antibodies.
Recognize the structure of lymphoid tissue. Lymphoid tissue is composed of various structures, including lymphoid nodules, germinal centers, and reticular fibers, each with specific functions.
Identify the function of germinal centers. Germinal centers are areas within lymphoid tissue where B lymphocytes proliferate, differentiate, and mutate their antibody genes during an immune response.
Consider the process of B lymphocyte activation. When B cells are activated by an antigen, they migrate to germinal centers where they rapidly divide and undergo somatic hypermutation and class switching.
Conclude that the enlargement of germinal centers is due to the rapid division and proliferation of B lymphocytes, which is a key feature of an active immune response.
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