Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

20. The Lymphatic System

Secondary Lymphoid Organs: Lymph Nodes

Anatomy & Physiology

20. The Lymphatic System

Secondary Lympoid Organs: Lymph Nodes

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Multiple Choice

When B lymphocytes are dividing rapidly, the __________ of the lymphoid tissue enlarge(s).

germinal centers

reticular fibers

lymphoid nodules

diffused lymphoid tissue

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Verified step by step guidance

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.