ATI LPN
Immune System Questions Questions
Question 1 of 5
Antimalarial drugs and high dose birth control will increase riboflavin.
Correct Answer: B
Rationale: Certainly. The correct answer is B (FALSE) because antimalarial drugs and high dose birth control do not increase riboflavin levels. Riboflavin is a water-soluble vitamin that is not affected by these medications. Choice A (TRUE) is incorrect as there is no evidence to support an increase in riboflavin due to these drugs. Choice C (Sometimes) is incorrect because there is no situation where these medications would lead to an increase in riboflavin. Choice D (Only in pregnancy) is also incorrect as riboflavin levels are not specifically affected by pregnancy or these medications.
Question 2 of 5
Absolute lymphocytosis without lymphadenopathy without hepatosplenomegaly, anemia, or thrombocytopenia is what stage in CLL prognosis Scoring-Rai Staging System?
Correct Answer: A
Rationale: The correct answer is A: Stage 0 in the Rai Staging System for Chronic Lymphocytic Leukemia (CLL). In stage 0, patients have lymphocytosis without any other symptoms or signs of advanced disease. This indicates a low-risk group with a favorable prognosis and no need for immediate treatment. Other choices are incorrect because they correspond to stages with increasing severity and additional symptoms such as lymphadenopathy, hepatosplenomegaly, anemia, or thrombocytopenia, which are not present in this case.
Question 3 of 5
Lipid exchange between the RBC membrane and the plasma occurs:
Correct Answer: A
Rationale: The correct answer is A: To replace lost lipids in the membrane. Lipid exchange in RBCs is crucial for membrane maintenance and repair. Lipids can be lost due to various factors like oxidative stress or mechanical stress. Replacing lost lipids helps maintain the integrity and functionality of the membrane. Summary of other choices: B: Providing a mechanism for excretion of lipid-soluble waste products is not a primary function of lipid exchange in RBCs. C: Ensuring symmetry between the lipid layers is important for membrane stability but not the primary purpose of lipid exchange in RBCs. D: Providing lipid-soluble nutrients to RBCs is not the main function of lipid exchange; RBCs primarily rely on glucose for energy.
Question 4 of 5
The acceptable range for hemoglobin values on a control sample is 13 ± 0.4 g/dL. A hemoglobin determination is performed five times in succession on the same control sample. The results are (in g/dL: 12, 12.3, 12, 12.2, and 12.1). These results are:
Correct Answer: A
Rationale: Rationale for Choice A: The results are precise but not accurate. Precision refers to the consistency of results, which is evident as the values are close to each other (12, 12.3, 12, 12.2, and 12.1). However, accuracy refers to how close the results are to the true value. Since the average of the results is outside the acceptable range (12.12 g/dL vs. 13 g/dL), they are not accurate. Therefore, the correct choice is A. Summary of other choices: B: Both accurate and precise - Inaccurate as the average value is outside the acceptable range. C: Accurate, but not precise - Inaccurate as the results are not consistent. D: Neither accurate nor precise - Results are precise (consistent) but not accurate.
Question 5 of 5
Which of the following would correlate with an elevated ESR value?
Correct Answer: D
Rationale: The correct answer is D: Inflammation. ESR (Erythrocyte Sedimentation Rate) measures the rate at which red blood cells settle in a tube over a specific period, which can be elevated in conditions causing inflammation. Inflammation triggers the release of acute-phase proteins, increasing the ESR. Osteoarthritis (A) is a degenerative joint disease and does not typically cause significant inflammation. Polycythemia (B) is an increase in red blood cells, not directly related to ESR. Decreased globulins (C) would not lead to an elevated ESR as it is associated with conditions like multiple myeloma or liver disease.