ATI RN
Immune System Exam Questions Questions
Question 1 of 5
The class I major histocompatibility complex (MHC)
Correct Answer: D
Rationale: MHC I has HLA-A, B, C loci; it's on nucleated cells , chromosome 6 , and highly polymorphic .
Question 2 of 5
In order for the B cells to secrete antibody efficiently, they need to be stimulated by T cells. The process in the thymus whereby these CD4+ T cells are saved from apoptosis and go on to the next step in differentiation is:
Correct Answer: A
Rationale: Positive selection saves useful T cells; negative deletes self-reactive, clonal selection is antigen-driven.
Question 3 of 5
What is the primary function of the thymus?
Correct Answer: B
Rationale: The thymus matures T cells; it doesn't filter lymph , produce antibodies , or just store cells .
Question 4 of 5
The right lymphatic duct empties into which vein?
Correct Answer: A
Rationale: The right lymphatic duct empties into the right subclavian vein ; left subclavian is for thoracic duct, others (C, D) are indirect.
Question 5 of 5
The lymphatic system aids digestion by transporting:
Correct Answer: C
Rationale: It transports fats from the gut; carbs , proteins , and vitamins are mainly blood-transported.