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

Introduction to the Immune System

Anatomy & Physiology

21. The Immune System

Introduction to the Immune System

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Multiple Choice

What is true of an individual who is lacking a thymus?

They are unable to produce antibodies.

They have an increased production of red blood cells.

They have an overactive immune response.

They have a reduced number of mature T cells.

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Verified step by step guidance

Understand the role of the thymus: The thymus is a primary lymphoid organ where T cells mature. It is crucial for the development of a functional and diverse T cell repertoire.

Recognize the function of T cells: T cells are a type of lymphocyte that play a central role in cell-mediated immunity. They are essential for identifying and responding to pathogens.

Identify the consequence of lacking a thymus: Without a thymus, an individual cannot properly mature T cells, leading to a reduced number of mature T cells in the body.

Consider the impact on the immune system: A reduced number of mature T cells results in a compromised immune system, as T cells are vital for mounting an effective immune response.

Evaluate the incorrect options: The inability to produce antibodies is related to B cells, not T cells. Increased red blood cell production is unrelated to the thymus. An overactive immune response is unlikely with fewer T cells.