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 of the following describes a primary immune response?

The initial response of the immune system to a previously unencountered antigen.

The activation of cytotoxic T cells in response to a known pathogen.

A rapid and robust response due to memory cells from a previous exposure.

The production of antibodies by plasma cells after a second exposure to the same antigen.

Previous problemNext problem

Verified step by step guidance

Understand the concept of a primary immune response: It is the initial response of the immune system when it encounters an antigen for the first time.

Recognize that during a primary immune response, the immune system is encountering the antigen without any prior memory of it, leading to a slower and less robust response compared to subsequent exposures.

Identify that the primary immune response involves the activation of naive B and T cells, which have not been exposed to the antigen before.

Differentiate between primary and secondary immune responses: A secondary response is faster and more robust due to the presence of memory cells from a previous exposure.

Conclude that the correct description of a primary immune response is the initial response of the immune system to a previously unencountered antigen, as it involves the first-time activation of the immune system's components.