Which of the following is true about the sinuses? Select all that apply.
(Select All that Apply.).

Naturally acquired active immunity occurs when the body produces antibodies in response to an infection or vaccine. This is not the case for antibodies passed through the placenta.

Choice B rationale:

Artificially acquired passive immunity involves the injection of antibodies, not the transfer through the placenta.

Choice C rationale:

Innate immunity refers to nonspecific defense mechanisms that come into play immediately or within hours of an antigen’s appearance in the body. This does not describe the process of antibody transfer through the placenta.

Choice D rationale:

Natural passive immunity occurs when antibodies are passed from the mother to the fetus through the placenta. This matches the description in the question.

So, the correct answer is Choice D, after analyzing all choices.

Choice A rationale:

Innate immunity is not an acquired immunity. Acquired immunity refers to immunity that develops after exposure to a specific pathogen.

Choice B rationale:

Innate immunity does not retain a memory of a pathogen after defeating it. This is a characteristic of adaptive immunity.

Choice C rationale:

Innate immunity does not offer protection against a particular pathogen. It provides a general defense against a wide range of invaders.

Choice D rationale:

Innate immunity is present at birth. It provides a fast response that involves first- and second-line defenses.