ATI RN
Pharmacology Practice Exam A ATI Questions
Question 1 of 5
The nurse is aware that efficient absorption of calcium is assisted by
Correct Answer: D
Rationale: Calcium absorption in the small intestine relies heavily on vitamin D, which enhances the process by increasing the expression of calcium-binding proteins and improving gut uptake efficiency. Without adequate vitamin D, calcium absorption drops significantly, leading to potential bone health issues like osteoporosis or osteomalacia. Intrinsic factor, produced in the stomach, is critical for vitamin B12 absorption, not calcium, as it binds B12 for uptake in the ileum. Coenzymes, while involved in metabolic reactions, don't directly facilitate calcium absorption; their role is broader and unrelated to this specific process. Phosphorus, an abundant mineral, works with calcium in bone formation but doesn't enhance its absorption-in fact, excessive phosphorus can compete with calcium. Vitamin D's active form, calcitriol, regulates calcium levels by promoting its transport across intestinal cells, making it indispensable for maintaining skeletal integrity. This mechanism underscores why vitamin D deficiency impairs calcium utilization, distinguishing it from the other options, which lack a direct link to absorption efficiency.
Question 2 of 5
The nurse has completed medication education for the anxious patient who is receiving buspirone (BuSpar). The nurse determines that the patient needs additional instruction when the patient makes which statement?
Correct Answer: B
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 3 of 5
Which sign is common with hypocalcemia?
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 4 of 5
A 33-year-old woman who is 20 weeks pregnant with a porcine heart valve is at risk for thromboembolism. Which of the following is the best agent to use in this situation?
Correct Answer: A
Rationale: Pregnancy and a porcine valve increase thromboembolism risk. Heparin , an anticoagulant, is safe in pregnancy. Streptokinase , a thrombolytic, is risky. TED stockings prevent but don't treat systemic risk. Warfarin is teratogenic. Heparin's non-placental crossing ensures fetal safety while managing her condition.
Question 5 of 5
A 22-year-old man has taken an overdose of sleeping pills after learning that he did not receive the job he has recently been interviewed for. He is found by his roommate conscious but not able to completely follow commands. The roommate calls the local poison control center. Instructions are given to self-administer syrup of ipecac while waiting for the rescue squad to respond. This agent has a mechanism of action that involves which of the following?
Correct Answer: B
Rationale: Syrup of ipecac induces vomiting in overdose. It stimulates the chemotactic trigger zone in the medulla-prompting emesis. Gag reflex stimulation is secondary. Suppressing pressures , gag reflex , or motor cortex (E) don't apply. Though less used now, ipecac's CNS action expels pills, aiding this acute scenario, distinct from mechanical or suppressive effects.