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

Classes of Antibodies

Anatomy & Physiology

21. The Immune System

Classes of Antibodies

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

The stem of an antibody contains which of the following regions?

Hinge region

Antigen-binding site

Constant region

Variable region

Previous problemNext problem

Verified step by step guidance

Understand the structure of an antibody: Antibodies are Y-shaped proteins that play a crucial role in the immune system by identifying and neutralizing foreign objects like bacteria and viruses.

Identify the main regions of an antibody: An antibody consists of two main regions - the variable region and the constant region. The variable region is responsible for binding to antigens, while the constant region determines the mechanism used to destroy the antigen.

Locate the stem of the antibody: The stem of the antibody is the part that extends downward from the Y-shape. This region is known as the constant region.

Differentiate between the regions: The hinge region is located between the arms and the stem, allowing flexibility. The antigen-binding site is part of the variable region, located at the tips of the Y-shape.

Conclude that the stem of an antibody contains the constant region, which is responsible for effector functions such as binding to receptors on immune cells.