Question

Which of the following best describes what the immune system does in terms of distinguishing cells?

Options

• It distinguishes self from non-self, differentiating between the body's own cells and invading foreign molecules or cells

• It recognizes only the body's own cells and ignores foreign molecules

• It produces only antibodies without recognizing antigens

• It eliminates all foreign cells regardless of whether they are harmful

Answer 1

A main feature of the immune system is its ability to distinguish self from non-self. This means it can differentiate between the body's own cells and tissues versus invading foreign molecules or cells, which is critical for targeted immune responses.