Scelta multipla
Which of the following best describes a specific immune response?
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21. The Immune System
Introduction to Adaptive Immunity
Scelta multipla
Which line of defense includes active immunity?
A
Fourth line of defense
B
First line of defense
C
Second line of defense
D
Third line of defense
Guida verificata passo dopo passo1
Understand the concept of the body's lines of defense: The immune system is structured in layers, each providing a different type of protection against pathogens.
First line of defense: This includes physical and chemical barriers such as skin and mucous membranes that prevent pathogens from entering the body.
Second line of defense: This involves non-specific immune responses like inflammation and phagocytosis, where white blood cells engulf and destroy invaders.
Third line of defense: This is where active immunity comes into play, involving specific immune responses. It includes the production of antibodies by B cells and the activation of T cells to target specific pathogens.
Active immunity is part of the third line of defense, characterized by the body's ability to remember and respond more effectively to pathogens it has encountered before, thanks to the adaptive immune system.
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