ATI LPN
Immune System Questions Questions
Question 1 of 5
When excessive bleeding occurs, which of the following causes blood pressure to fall?
Correct Answer: A
Rationale: The correct answer is A because when excessive bleeding occurs, the volume of blood in the blood vessels decreases, causing a drop in blood pressure. This is due to the insufficient amount of fluid left in the blood vessels to maintain normal blood pressure. Choice B is incorrect because an increased oxygen supply would not directly cause a drop in blood pressure. Choice C is incorrect because a decrease in iron in the blood would not directly affect blood pressure in the context of excessive bleeding. Choice D is incorrect as an increase in red blood cell production may help compensate for blood loss but would not cause a drop in blood pressure directly.
Question 2 of 5
Most but not all symptoms of anemia are similar in older and younger people. Which of the following symptoms is more likely to occur in older people with anemia than in younger people with anemia?
Correct Answer: A
Rationale: The correct answer is A: Confusion and agitation. In older people with anemia, decreased oxygen supply to the brain can lead to cognitive symptoms like confusion and agitation. This is more likely in older individuals due to age-related changes in the brain's ability to compensate for decreased oxygen levels. Explanation of why other choices are incorrect: B: Increased thirst is a common symptom of anemia in all age groups due to the body's attempt to increase blood volume. C: Shortness of breath is a common symptom of anemia regardless of age, as it is a result of decreased oxygen-carrying capacity of the blood. D: Weak and rapid pulse is a common symptom of anemia in all age groups due to the heart working harder to compensate for decreased oxygen levels.
Question 3 of 5
Causes spurious decrease in MCV
Correct Answer: A
Rationale: The correct answer is A: Cryofibrinogen. Cryofibrinogenemia can cause a spurious decrease in Mean Corpuscular Volume (MCV) due to the presence of cryoprecipitates in the blood sample, leading to underestimation of red blood cell volume. Cryofibrinogen does not actually alter the size of the red blood cells, but its presence interferes with the accurate measurement of MCV. Summary: B: Hyperglycemia does not affect MCV. C: Autoagglutination causes clumping of red blood cells, leading to falsely elevated MCV. D: High white blood cell count does not directly impact MCV.
Question 4 of 5
Folic acid therapy can cause sickle cell anemia
Correct Answer: B
Rationale: The correct answer is B: FALSE. Folic acid therapy does not cause sickle cell anemia. Folic acid is a B vitamin that helps in the production of red blood cells and is commonly used to treat anemia. Sickle cell anemia is a genetic disorder where red blood cells become sickle-shaped, leading to various health complications. Folic acid therapy is not known to cause this genetic condition. Choices A, C, and D are incorrect because folic acid therapy does not lead to sickle cell anemia in any circumstances or age group.
Question 5 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.