ATI RN
Immune System Test Quizlet Questions
Question 1 of 5
Select the correct number of statements that are true.
Correct Answer: A
Rationale: The correct answer is A. Statement 1 and 3 are true because selecting them would result in a correct answer. Statement 2 is incorrect as it claims that only 2 and 4 are correct, which contradicts the correct answer. Statement 4 is also incorrect as it claims that only 3 and 4 are correct, which is not consistent with the correct answer. The option "All of the above are correct" (D) is false because it includes statement 2, which is incorrect. Therefore, A is the correct choice because it accurately identifies the true statements.
Question 2 of 5
The nurse is administering medications to a patient. Which medications should the nurse understand is being given to suppress C-reactive protein levels?
Correct Answer: A
Rationale: The correct answer is A: Aspirin and steroids. Aspirin is known to suppress C-reactive protein levels by inhibiting inflammatory pathways. Steroids also have anti-inflammatory properties that can lower CRP levels. Antibiotics, diuretics, epinephrine, antihistamines, antihypertensives, and antineoplastic agents do not have direct effects on CRP levels. It is important for the nurse to understand the mechanism of action of medications to ensure safe and effective administration.
Question 3 of 5
The nurse is reviewing the immune system with a patient newly diagnosed with an autoimmune disorder. What should the nurse explain as the purpose of antibodies?
Correct Answer: D
Rationale: The correct answer is D. Antibodies attach to antigens to label them for destruction. This is crucial in the immune response to identify and mark harmful substances for elimination. Choice A is incorrect because antibodies do not destroy antigens directly. Choice B is incorrect as antibodies are specific to particular antigens. Choice C is incorrect as blood type specificity is determined by different antigens, not antibodies.
Question 4 of 5
Ribosomes associated with cells or organelles have a certain size, which is expressed in Svedberg units. Which associations are incorrect?
Correct Answer: A
Rationale: The correct answer is A because cyanobacteria have ribosomes measured in 70s, not 80s. Ribosomes in prokaryotes are either 70s (composed of 50s and 30s subunits) or 80s in eukaryotes (60s and 40s subunits). Choices B, C, and D are incorrect because chloroplasts, photosynthetic bacteria, and green algal cytoplasm all have ribosomes measured in 70s or 80s, consistent with their cell types.
Question 5 of 5
A small molecule that combines with a specific allosteric protein so that both prevent RNA polymerase activity is called a(n):
Correct Answer: C
Rationale: The correct answer is C: corepressor. A corepressor is a small molecule that binds to an allosteric protein to inhibit its activity. In this case, the corepressor prevents RNA polymerase activity. The other choices are incorrect because: A: Inducer activates gene expression. B: Repressor inhibits gene expression by binding to DNA. D: Leader is not a term related to allosteric regulation.