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 Heart3h 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

21. The Immune System

Clonal Selection

Anatomy & Physiology

21. The Immune System

Clonal Selection

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Multiple Choice

Which of the following is NOT an organ where clonal selection occurs?

Spleen.

Lymph nodes.

Bone marrow.

Mucosa associated lymphoid tissue.

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Verified step by step guidance

Understand the concept of clonal selection: Clonal selection is a process in the immune system where specific lymphocytes are selected to proliferate and form clones in response to an antigen.

Identify the organs involved in clonal selection: Clonal selection primarily occurs in secondary lymphoid organs where lymphocytes encounter antigens.

Recognize the secondary lymphoid organs: The spleen, lymph nodes, and mucosa-associated lymphoid tissue (MALT) are secondary lymphoid organs where clonal selection typically occurs.

Consider the role of bone marrow: Bone marrow is primarily involved in the production and maturation of lymphocytes, not in clonal selection, which occurs after lymphocytes have matured and migrated to secondary lymphoid organs.

Conclude which organ is not involved in clonal selection: Based on the understanding that clonal selection occurs in secondary lymphoid organs, identify bone marrow as the organ not involved in this process.