Prelims 2022 · Science and Technology · Question 97
Which one of the following statements best describes the role of B cells and T cells in the human body?
Answer
They protect the body from the diseases caused by pathogens.
- (a) B cells and T cells are lymphocytes of the adaptive immune system; they do not primarily protect against environmental allergens. Allergic responses are mainly mediated by IgE, mast cells, and related pathways. Verdict: Incorrect.
- (b) Pain and inflammation are not alleviated by B cells and T cells as their main role. Their core function is immune defense, and they can also participate in inflammatory responses. Verdict: Incorrect.
- (c) B cells and T cells are not generally immunosuppressants; they are key immune cells. Though some T cells (regulatory T cells) help suppress immune responses, this is not the best overall description. Verdict: Incorrect.
- (d) B cells produce antibodies and T cells help kill infected cells or coordinate immune responses, thereby protecting the body from diseases caused by pathogens. Verdict: Correct.