ATI RN
Immune System Questions and Answers Quizlet Questions
Question 1 of 5
Which of the options below best completes the following statement: NK cell cytotoxicity is mediated by.
Correct Answer: D
Rationale: NK cell cytotoxicity involves activating signals, lack of inhibition (e.g., low MHC), and death receptor ligands (e.g., FasL), making all options correct.
Question 2 of 5
Which of the options below does not describe α:β T-cell receptor rearrangement:
Correct Answer: A
Rationale: TCR rearrangement requires RAG-1/2, unlike the other accurate descriptions.
Question 3 of 5
Which of the following is used for typing when a patient is being prepared for an organ transplant?
Correct Answer: D
Rationale: All MHC classes (A, B, C) are typed for transplants due to immune recognition; D is correct.
Question 4 of 5
Naturally acquired active immunity would be most likely acquired through which of the following processes?
Correct Answer: D
Rationale: Natural active immunity comes from infection and recovery; vaccination is artificial.
Question 5 of 5
What kind of defense barrier is provided by the mucous membrane of the body?
Correct Answer: A
Rationale: Mucous membranes are physical barriers ; not mechanical , chemical , or biological .