ATI RN
FHEA Drugs That Affect the Cardiovascular System Quizlet Questions
Question 1 of 5
This drug is a Class IA antiarrhythmic drug:
Correct Answer: D
Rationale: The correct answer is D: Quinidine. Quinidine is a Class IA antiarrhythmic drug that works by blocking sodium channels, prolonging the action potential duration, and delaying repolarization in cardiac cells. This helps in treating atrial and ventricular arrhythmias. Sotalol (A) is a Class III antiarrhythmic drug, Propranolol (B) is a beta-blocker, and Verapamil (C) is a calcium channel blocker, not Class IA antiarrhythmics.
Question 2 of 5
Choose the appropriate mechanism of vinpocetine action:
Correct Answer: A
Rationale: The correct answer is A because vinpocetine is known to dilate cerebral vessels, leading to improved blood supply to the brain. This mechanism of action helps enhance cerebral circulation and oxygen delivery, thereby potentially improving cognitive function. Choice B is incorrect because vinpocetine does not constrict cerebral vessels and decrease blood supply. Choice C is incorrect as vinpocetine does not directly stimulate GABA-receptors to increase cerebral metabolic processes. Choice D is incorrect as vinpocetine does not constrict peripheral vessels and increase blood pressure.
Question 3 of 5
The primary reason for a physician to prescribe human insulin is that:
Correct Answer: C
Rationale: The correct answer is C because human insulin can be given to patients who have an allergy to animal insulins. This is crucial as some patients may develop allergic reactions to animal insulins, making it unsafe for them to use. Human insulin, being a synthetic form, is less likely to trigger allergies in such patients. The other choices, A, B, and D, are incorrect as they do not address the primary reason for prescribing human insulin, which is the specific need for patients with allergies to animal insulins.
Question 4 of 5
Which of the following glucocorticoids have one fluoride atom in its chemical structure?
Correct Answer: B
Rationale: The correct answer is B: Fluocinolone. This glucocorticoid has one fluoride atom in its chemical structure, making it the only option that fits the criteria. Prednisolone (A) does not contain any fluoride atoms. Triamcinolone (C) also does not have a fluoride atom. Option D is incorrect because only Fluocinolone (B) has the specific chemical structure with one fluoride atom. Thus, B is the correct answer.
Question 5 of 5
Which of the following histamine H1 antagonists is a long-acting (up to 24-48 h) antihistamine drug?
Correct Answer: A
Rationale: Step-by-step rationale: 1. Diazoline contains cetirizine, a second-generation antihistamine with a long duration of action. 2. Cetirizine has a half-life of approximately 7-10 hours, providing prolonged relief. 3. Its long-acting nature makes it effective in managing allergies for up to 24-48 hours. 4. Diprazine, Suprastine, and Dimedrol do not contain cetirizine and are not known for their long duration of action. Summary: Diazoline (choice A) is the correct answer as it contains cetirizine, a long-acting antihistamine. Choices B, C, and D do not contain cetirizine and are not known for their extended duration of action.