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 Adaptive Immunity

Anatomy & Physiology

21. The Immune System

Introduction to Adaptive Immunity

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 type of immunity results from exposure to an antigen?

Active immunity

Nonspecific immunity

Innate immunity

Passive immunity

Previous problemNext problem

Verified step by step guidance

Understand the concept of immunity: Immunity refers to the body's ability to defend itself against pathogens, toxins, and other harmful agents. There are different types of immunity, each with distinct mechanisms and characteristics.

Define active immunity: Active immunity occurs when the immune system is exposed to an antigen (a foreign substance) and produces its own antibodies and memory cells to fight off the pathogen. This can happen naturally through infection or artificially through vaccination.

Differentiate between nonspecific immunity and innate immunity: Nonspecific immunity (also called innate immunity) is the body's first line of defense, which includes physical barriers like skin, mucous membranes, and general immune responses like inflammation. It does not involve exposure to a specific antigen.

Explain passive immunity: Passive immunity occurs when antibodies are transferred to an individual from another source, such as through maternal antibodies in breast milk or through antibody injections. It does not involve the individual's immune system actively producing antibodies.

Conclude that active immunity is the correct answer: Exposure to an antigen triggers the immune system to actively produce antibodies and memory cells, which is the hallmark of active immunity. This distinguishes it from nonspecific, innate, or passive immunity.