Multiple Choice
The adaptive immune response is the first immune response a host initiates against a pathogen.
21. The Immune System
Overview of Host Defenses
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Which of the following immune system components are not a part of the innate immune system?
A
B cells
B
Phagocytic Cells
C
Complement system
D
Inflammatory cytokines
Verified step by step guidance1
Understand the difference between the innate and adaptive immune systems. The innate immune system is the body's first line of defense and responds to pathogens in a generic way, while the adaptive immune system is more specific and involves memory cells.
Identify the components of the innate immune system. These include physical barriers like skin, phagocytic cells (such as macrophages and neutrophils), the complement system, and inflammatory cytokines.
Recognize that B cells are part of the adaptive immune system. They are responsible for producing antibodies and have a memory function, which is not a characteristic of the innate immune system.
Review the roles of phagocytic cells, the complement system, and inflammatory cytokines. Phagocytic cells engulf and digest pathogens, the complement system helps to clear pathogens, and inflammatory cytokines mediate inflammation.
Conclude that B cells are not part of the innate immune system, as they are involved in the adaptive immune response, unlike the other components listed.
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