Question

a student claims that antibodies are \killer proteins that hunt down and destroy pathogens.\ evaluate this statement based on the text.
the statement is correct; antibodies are described as y - shaped weapons that kill pathogens.
the statement is partially correct; antibodies hunt down pathogens but can only slow them down, not destroy them.
the statement is incorrect; antibodies do not destroy pathogens directly but instead form a complex that \flags\ the pathogen for destruction by other cells.
the statement is incorrect; antibodies are not proteins, and they only attack viruses.
the text emphasizes that the bodys first line of defense is its primary strategy for staying healthy. which statement best evaluates why these barriers are so fundamentally important?
they prevent the vast majority of pathogens from ever entering the body, reducing the need for later, more complex immune responses.
they are the only defenses in the body that can successfully stop viruses.
they are the most powerful defenses and can destroy any pathogen on contact
they create permanent, lifelong immunity to all pathogens after a single exposure

Explanation:

Antibodies are proteins. They bind to pathogens to form complexes that mark pathogens for destruction by other immune - cells like phagocytes, not directly destroy them. The body's first - line defenses (skin, mucous membranes etc.) prevent most pathogens from entering the body, reducing the load on the immune system.

Answer:

1. C. The statement is incorrect; antibodies do not destroy pathogens directly but instead form a complex that "flags" the pathogen for destruction by other cells.
2. A. They prevent the vast majority of pathogens from ever entering the body, reducing the need for later, more complex immune responses.