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

21. The Immune System

Introduction to T Lymphocytes

Anatomy & Physiology

21. The Immune System

Introduction to T Lymphocytes

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Multiple Choice

Which of the following answers is a major difference between cell-mediated and humoral immunity?

Cell-mediated immunity utilizes T cells while humoral immunity utilizes B cells to respond to infection.

Cell-mediated immunity involves antigens presented on APCs while humoral immunity involves free antigens.

Cell-mediated immunity responds to antigens outside of cells. Humoral immunity responds to antigens within a cell.

A and B.

B and C.

All of the above are major differences between cell-mediated and humoral immunity.

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Verified step by step guidance

Understand the two types of adaptive immunity: cell-mediated and humoral immunity. Cell-mediated immunity primarily involves T cells, while humoral immunity involves B cells.

Recognize that cell-mediated immunity is effective against intracellular pathogens, such as viruses that have infected a cell, whereas humoral immunity targets extracellular pathogens, like bacteria and viruses in the bloodstream.

Identify that in cell-mediated immunity, antigens are presented on the surface of antigen-presenting cells (APCs) to T cells. In contrast, humoral immunity involves B cells recognizing free antigens directly.

Evaluate the given options: Option A states that cell-mediated immunity uses T cells and humoral immunity uses B cells, which is correct. Option B states that cell-mediated immunity involves antigens on APCs and humoral immunity involves free antigens, which is also correct.

Consider option C, which incorrectly states that cell-mediated immunity responds to antigens outside of cells and humoral immunity responds to antigens within a cell. Therefore, the correct answer is A and B, as both are true statements about the differences between the two types of immunity.