ATI RN
Lymphatic System Test Questions Questions
Question 1 of 5
Which of the following statements is specific to gut chemical barriers?
Correct Answer: A
Rationale: Pepsin, a digestive enzyme in the stomach, acts as a gut-specific chemical barrier, unlike AMPs and lysozymes, which are broader innate defenses.
Question 2 of 5
Central tolerance: (negative selection)
Correct Answer: D
Rationale: Central tolerance (thymus) removes self-reactive T cells, supplemented by peripheral tolerance, preventing autoimmunity.
Question 3 of 5
Specific immunity can be acquired either naturally or artificially and involves
Correct Answer: A
Rationale: Specific immunity involves antibodies , antigens , and complement , all part of adaptive responses; thus, all of the below is correct.
Question 4 of 5
Theoretically, type_____________ ______ blood can be donated to all persons because it lacks_____________ ______
Correct Answer: A
Rationale: Type O lacks antigens, making it universal; AB has antigens, A and O misstate.
Question 5 of 5
The ability of the immune system to recognize self-antigens versus non-self antigen is an example of:
Correct Answer: B
Rationale: Self-tolerance distinguishes self from non-self; specific immunity is broader.