ATI RN
Lymphatic System Quiz Questions Questions
Question 1 of 5
Which receptors occur exclusively on cells of the adaptive immunity?
Correct Answer: A
Rationale: T-cell receptors are exclusive to adaptive immunity (T cells); TLRs , mannose receptors , and complement receptors are on innate immune cells like macrophages.
Question 2 of 5
Which type of T cell has limited TCR diversity?
Correct Answer: A
Rationale: NKT cells have limited TCR diversity ; gamma-delta and alpha-beta T cells have broader repertoires.
Question 3 of 5
What is the role of natural regulatory T cells?
Correct Answer: B
Rationale: Natural Treg cells suppress self-reactive T cells ; they don't activate , target B cells , or cause hypermutation .
Question 4 of 5
Which of these does not belong with the others?
Correct Answer: A
Rationale: Thymus is a primary lymphoid organ; lymph node , sinus , and nodule are secondary lymphoid structures.
Question 5 of 5
Individuals with defects in T cell development have a severe immunodeficiency disease called SCID (severe combined immunodeficiency disease). In these individuals, the absence of all T cells causes defects in both cell-mediated (T cell-based) and humoral (antibody-based) immune responses. The defect in antibody responses in SCID patients is due to:
Correct Answer: D
Rationale: T follicular helper cells are critical for antibody responses; B-cell development is T-independent, organs form , phagocytes exist , B cells survive .