Which of the following accurately describes innate immunity?

Question

Quizplus · Accepted Answer

Innate immunity refers to the non-specific defense mechanisms that are present at birth and act as the first line of defense against foreign agents. This includes physical barriers like skin and mucous membranes, as well as chemical defenses like stomach acid and antimicrobial proteins.

Options B and C are incorrect because they describe adaptive immunity, which is a specific response to a particular pathogen and develops over time through repeated exposures.

Option D is partially correct because innate immunity is indeed the second line of defense after physical barriers, but adaptive immunity is the third line of defense.

Which of the Following Accurately Describes Innate Immunity