ATI RN
ATI Pharmacology Online Practice 2023 A Questions
Question 1 of 5
Mark the location of the beginning of the plateau phase on this dose-response relationship curve.
Correct Answer: D
Rationale: The plateau phase, where max effect holds despite dose increases, is the curve's top horizontal stretch, per pharmacodynamic curves. Beginning is pre-effect. Upward move is onset. Mid-upstroke is rising. Plateau marks saturation, standard in graphs.
Question 2 of 5
A patient is mowing his lawn on a hot Saturday afternoon. He begins to notice chest pain. What should his first action be?
Correct Answer: B
Rationale: The patient's first action should be to stop mowing and sit or lie down. Chest pain can be a symptom of a heart attack, and it is important for the patient to immediately rest and avoid physical strain. Continuing to mow the lawn could worsen the condition or lead to further complications. Sitting or lying down will help reduce the heart's workload and minimize the exertion on the body. If the chest pain continues or worsens, seeking medical help should be the next course of action.
Question 3 of 5
A patient in the clinic reports difficulty tolerating the current ACE inhibitor medication, and questions if another medication could be used. The nurse correctly suspects the prescriber will choose which medication, which affects the renin-angiotensin-aldosterone system?
Correct Answer: B
Rationale: Losartan is an angiotensin II receptor blocker (ARB) that affects the renin-angiotensin-aldosterone system (RAAS) and is often used as an alternative to ACE inhibitors. Atenolol (A) is a beta-blocker, spironolactone (C) is a potassium-sparing diuretic, and adenosine (D) is used for arrhythmias. ARBs like losartan are preferred for patients who cannot tolerate ACE inhibitors due to side effects like cough or angioedema.
Question 4 of 5
After administering the drug Atropine to a patient, the nurse notices side effects of dry mouth, tachycardia, and drowsiness. The nurse suspects ans overdose of the drug. Which of the following is the antidote for Atropine?
Correct Answer: C
Rationale: Physostigmine is the antidote for Atropine overdose. Atropine is an anticholinergic drug that blocks the action of acetylcholine. Physostigmine works by increasing the levels of acetylcholine in the body, counteracting the effects of Atropine. It can help reverse the side effects of Atropine overdose, such as dry mouth, tachycardia, and drowsiness. Flumazenil is the antidote for benzodiazepines, Naloxone is the antidote for opioids, and Protamine sulfate is the antidote for heparin.
Question 5 of 5
Restoration of blood flow results through the dissolution of clot by:
Correct Answer: B
Rationale: Plasmin is an enzyme that is responsible for breaking down fibrin, a protein that forms blood clots. When an area of vessel needs to have its blood flow restored, such as after a clot has formed, plasmin is activated to dissolve the clot. By breaking down the fibrin mesh of the clot, plasmin helps restore normal blood flow in the affected vessel. Therefore, the restoration of blood flow results through the dissolution of clot by plasmin, making option B the correct answer.