ATI RN
Immune System Disorders Quizlet Questions
Question 1 of 5
Class switching of immunoglobulins occurs
Correct Answer: A
Rationale: The correct answer is A because class switching of immunoglobulins typically occurs during an immune response, leading to the production of antibodies of different classes like IgM to IgG. This process helps enhance the immune response and memory. Choice B, binding complement, refers to the function of antibodies in the classical pathway of the complement system, not class switching. Choice C, causing histamine release, is typically associated with IgE antibodies in allergic reactions, not class switching. Choice D, mediating immunoglobulin class switching, is too vague and does not provide a clear explanation compared to choice A.
Question 2 of 5
The nurse is caring for a patient who has had a total hip replacement and is using an abductor wedge. For which finding should the nurse assess?
Correct Answer: B
Rationale: The correct answer is B: Alteration in peripheral circulation. The abductor wedge can affect blood flow to the legs, leading to potential complications like deep vein thrombosis. The nurse should assess for signs of impaired circulation such as color changes, temperature differences, and peripheral pulses. Muscle spasms (A) may occur due to the surgery but are not directly related to the wedge. Compression fracture (C) is not typically a concern with an abductor wedge. Assessing the appropriateness of the wedge size (D) is important but not as critical as monitoring for alterations in peripheral circulation.
Question 3 of 5
Which of the following statements is false about dendritic cells
Correct Answer: B
Rationale: The correct answer is B because dendritic cells are not only found in lymph nodes but also in tissues. These cells are antigen-presenting cells that capture and present antigens to T cells. A, C, and D are true statements about dendritic cells: A) They are found in tissues, C) They express high levels of MHC molecules for antigen presentation, and D) They are best at activating naive T cells due to their ability to prime adaptive immune responses.
Question 4 of 5
Memory T cells
Correct Answer: C
Rationale: The correct answer is C because memory T cells have a lower threshold of activation than naïve T cells. This is because memory T cells have already been primed by previous exposure to antigens, making them more responsive upon re-exposure. This heightened sensitivity allows memory T cells to mount a faster and stronger immune response upon encountering the same antigen again. Choice A is incorrect because memory T cells primarily reside in peripheral tissues and not in secondary lymphoid tissues. Choice B is incorrect because memory T cells have encountered antigens before. Choice D is incorrect because memory T cells exist in a lower frequency compared to naïve T cells due to clonal expansion during the primary immune response.
Question 5 of 5
Which of the following statements about the 2009 H1N1 pandemic is NOT true
Correct Answer: B
Rationale: The correct answer is B. Individuals over 60 were not especially affected by the 2009 H1N1 pandemic. This is because older individuals had some level of immunity due to previous exposure to similar strains. The other choices are incorrect because: A: The 2009 H1N1 virus originated from a combination of 2 different strains, not 4. C: WHO declared a level 6 pandemic phase in June 2009. D: The 2009 H1N1 virus was considered less virulent compared to other strains.