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 T Lymphocytes

Anatomy & Physiology

21. The Immune System

Introduction to T Lymphocytes

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which of the following is true of receptor editing of the T-cell receptor?

Receptor editing involves the deletion of T-cell receptors that are non-functional.

Receptor editing is a process that enhances the affinity of the T-cell receptor for antigens.

Receptor editing occurs to change the specificity of the T-cell receptor to avoid self-reactivity.

Receptor editing is primarily a mechanism used by B-cells, not T-cells.

Previous problemNext problem

Verified step by step guidance

Understand the concept of receptor editing: Receptor editing is a mechanism primarily associated with B-cells, not T-cells. It involves altering the receptor specificity to prevent self-reactivity, ensuring that the immune system does not attack the body's own tissues.

Recognize the role of receptor editing in B-cells: In B-cells, receptor editing occurs during their development in the bone marrow. If a B-cell receptor binds too strongly to self-antigens, the cell can undergo receptor editing to change its specificity and avoid autoimmunity.

Differentiate between B-cell and T-cell receptor editing: While receptor editing is a well-documented process in B-cells, T-cells primarily undergo a different process called negative selection in the thymus to eliminate self-reactive cells, rather than receptor editing.

Identify the correct statement: The statement 'Receptor editing occurs to change the specificity of the T-cell receptor to avoid self-reactivity' is incorrect because receptor editing is not a process used by T-cells. It is primarily a mechanism used by B-cells.

Conclude with the correct understanding: Receptor editing is not a mechanism used by T-cells to enhance affinity or change specificity. Instead, T-cells rely on other processes like negative selection to ensure self-tolerance.