ATI RN
Anatomy of Hematologic System Questions
Question 1 of 5
During haemostasis, prostacyclin
Correct Answer: B
Rationale: Prostacyclin is a vasodilator that inhibits platelet aggregation and promotes fibrinolysis. Vasodilation helps reduce blood pressure, improve blood flow, and prevent clot formation. Therefore, choice B is correct. Choice A is incorrect as prostacyclin does not cleave prothrombin. Choice C is incorrect as prostacyclin inhibits platelet aggregation. Choice D is incorrect as prostacyclin does not activate fibrinolysis.
Question 2 of 5
The nurse is reviewing the parts of the complete blood count and differential with a patient. Where should the nurse state that neutrophils, eosinophils, and basophils are produced?
Correct Answer: D
Rationale: The correct answer is D: Red bone marrow. Neutrophils, eosinophils, and basophils are all types of white blood cells that are produced in the red bone marrow. Red bone marrow is the primary site of hematopoiesis in adults, where all blood cells, including white blood cells, are produced. The red bone marrow contains stem cells that differentiate into various types of blood cells, including neutrophils, eosinophils, and basophils. Therefore, the nurse should explain to the patient that these specific types of white blood cells are produced in the red bone marrow. The other choices (A: Spleen, B: Thymus, C: Lymph nodes) are incorrect because they are not the primary sites for the production of these specific white blood cells.
Question 3 of 5
The nurse is documenting findings after completing data collection with a patient. What term should the nurse use to document a large area of discoloration from hemorrhage under the skin?
Correct Answer: D
Rationale: The correct term for a large area of discoloration from hemorrhage under the skin is "Ecchymosis" (Choice D). Ecchymosis refers to the medical term for a bruise, which is characterized by a large area of skin discoloration caused by bleeding beneath the skin due to trauma or injury. Pallor (Choice A) refers to paleness of the skin due to decreased blood flow or anemia, not discoloration from hemorrhage. Rubor (Choice B) refers to redness of the skin due to increased blood flow, not discoloration from hemorrhage. Petechiae (Choice C) are tiny red or purple spots on the skin caused by broken capillaries, not a large area of discoloration from hemorrhage as described in the question.
Question 4 of 5
The nurse is monitoring a patient receiving a blood product and is concerned that the blood is going to deteriorate before it is complete infused. What is the maximum time that blood can hang during infusion before it begins to deteriorate?
Correct Answer: D
Rationale: The correct answer is D: 4 hours. Blood products typically have a maximum hang time of 4 hours to reduce the risk of bacterial contamination and ensure the integrity of the product. Beyond this time, there is an increased risk of bacterial growth, which can lead to serious infections in the patient. It is crucial to adhere to the recommended hang time to maintain the safety and efficacy of the blood product. Summary of other choices: A: 1 hour - Too short of a time frame for a blood product to be infused, as it would not allow for the complete administration. B: 2 hours - While closer to the correct answer, it still falls short of the recommended 4-hour maximum hang time for blood products. C: 3 hours - Again, this is not the optimal choice as it exceeds the safe hang time for blood products, increasing the risk of contamination and deterioration.
Question 5 of 5
The nurse is reviewing the results of a patient's arterial blood gas analysis. What should the nurse recognize as being a normal blood pH?
Correct Answer: C
Rationale: The normal blood pH range is 7.35-7.45. Choice C (7.38) falls within this range, indicating a normal pH level. Choices A (7.29) and D (7.48) are outside the normal range, indicating acidosis and alkalosis, respectively. Choice B (7.31) is slightly below the normal range, indicating mild acidosis. Therefore, the correct answer is C as it represents a normal blood pH level within the appropriate range.