Multiple Choice
Which term describes antibodies binding to a virus preventing it from attaching to host cells?
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21. The Immune System
Outcomes of Antibody Binding to Antigen
Multiple Choice
Which of the following is NOT a protective outcome of antibody-antigen binding?
A
Antibody-antigen complex triggering the complement system when bound to an antigen.
B
Antibodies cross-linking pathogens so that they can be easily phagocytosed by macrophages.
C
Antibodies signaling to a cytotoxic T cell that a host cell is infected.
D
Antibodies binding to bacteria and prevent the bacteria from moving throughout the body.
E
Antibodies binding to blood vessel walls resulting in vasodilation.
Verified step by step guidance1
Understand the role of antibodies in the immune system: Antibodies are proteins produced by the immune system to identify and neutralize foreign objects like bacteria and viruses.
Identify the protective outcomes of antibody-antigen binding: These include neutralization of pathogens, opsonization (marking for phagocytosis), activation of the complement system, and agglutination (clumping of pathogens).
Evaluate each option: Determine if each option describes a known protective mechanism of antibody-antigen interactions.
Analyze the option 'Antibodies binding to blood vessel walls resulting in vasodilation': Consider whether this is a recognized protective mechanism of antibody action.
Conclude that 'Antibodies binding to blood vessel walls resulting in vasodilation' is not a typical protective outcome of antibody-antigen binding, as vasodilation is not directly related to the neutralization or elimination of pathogens.
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