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

Primary and Secondary Response of Adaptive Immunity

Anatomy & Physiology

21. The Immune System

Primary and Secondary Response of Adaptive Immunity

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Multiple Choice

During an immune response, the latent or lag period is the number of days between the initial infection of the host and antibody production used to fight the infection. Which type of immune response will have the longer latent period?

Primary Immune Response.

Secondary Immune Response.

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Verified step by step guidance

Understand the concept of the immune response: The immune system has two main types of responses to pathogens: the primary immune response and the secondary immune response.

Define the primary immune response: This is the body's first encounter with a specific antigen. During this response, the immune system takes time to recognize the antigen and produce antibodies, resulting in a longer latent period.

Define the secondary immune response: This occurs when the body is exposed to the same antigen again. Memory cells from the primary response recognize the antigen quickly, leading to a faster production of antibodies and a shorter latent period.

Compare the latent periods: The primary immune response has a longer latent period because it involves the initial recognition and production of antibodies, whereas the secondary immune response is quicker due to the presence of memory cells.

Conclude which response has the longer latent period: Based on the definitions and comparisons, the primary immune response will have the longer latent period.