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

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Multiple Choice

What is the primary difference between passive and active immunity?

Passive immunity involves the direct introduction of antibodies, while active immunity involves the production of antibodies by the immune system.

Active immunity is only acquired naturally, while passive immunity can only be acquired artificially.

Active immunity is acquired through vaccination, whereas passive immunity is acquired through exposure to pathogens.

Passive immunity lasts longer than active immunity because it involves memory cells.

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Verified step by step guidance

Understand the definitions: Passive immunity refers to the direct introduction of antibodies into the body, whereas active immunity involves the body's own immune system producing antibodies in response to an antigen.

Identify the sources: Passive immunity can be acquired naturally, such as through maternal antibodies passed to a baby, or artificially, such as through antibody-containing treatments. Active immunity is typically acquired through exposure to a pathogen or through vaccination.

Consider the duration: Active immunity generally lasts longer because it involves the activation of memory cells that provide long-term protection. Passive immunity provides immediate but temporary protection as it does not involve memory cells.

Evaluate the acquisition methods: Active immunity is often acquired through vaccination, which stimulates the immune system to produce antibodies. Passive immunity is acquired through the transfer of antibodies from another source, such as an injection of immunoglobulins.

Summarize the key differences: The primary difference is that passive immunity involves the transfer of ready-made antibodies, providing immediate but short-term protection, while active immunity involves the body's own production of antibodies, leading to long-lasting immunity due to the presence of memory cells.