ATI RN
ATI Pharmacology Practice A 2023 Questions
Question 1 of 5
A 31-year-old woman is planning to take a 7-day cruise to the Caribbean islands. She has never been on a ship before and fears developing motion sickness. She purchases scopolamine transdermal patch. When is the best time for her to place the patch to maximize drug efficacy?
Correct Answer: D
Rationale: Scopolamine prevents motion sickness via anticholinergic action. Applying prior to symptoms -ensures prophylaxis. After nausea (A, B) or vomiting is too late. Memory loss is a side effect, not timing. Preemptive use maximizes efficacy for her cruise.
Question 2 of 5
The nurse is caring for a patient who is receiving warfarin (Coumadin) and notes bruising and petechiae on the patient™s extremities. The nurse will request an order for which laboratory test?
Correct Answer: B
Rationale: The nurse should request an order for a platelet level to assess the patient's platelet count. Warfarin (Coumadin) is an anticoagulant medication that works by interfering with the blood clotting process. Bruising and petechiae may be signs of decreased platelet count or impaired platelet function. Monitoring the platelet level will help determine if the patient's symptoms are related to thrombocytopenia (low platelet count). While the International Normalized Ratio (INR) is commonly used to monitor the effects of warfarin therapy, in this case, the presence of bruising and petechiae suggest a need to assess platelet levels specifically. PT and aPTT tests assess the clotting function of factors produced by the liver and are not directly related to platelet count. Vitamin K level may be tested in cases of suspected vitamin K deficiency, but it would not directly help in assessing
Question 3 of 5
A 31-year-old woman is planning to take a 7-day cruise to the Caribbean islands. She has never been on a ship before and fears developing motion sickness. She purchases scopolamine transdermal patch. When is the best time for her to place the patch to maximize drug efficacy?
Correct Answer: D
Rationale: Scopolamine prevents motion sickness via anticholinergic action. Applying prior to symptoms -ensures prophylaxis. After nausea (A, B) or vomiting is too late. Memory loss is a side effect, not timing. Preemptive use maximizes efficacy for her cruise.
Question 4 of 5
A 9-year-old boy is sent for neurologic evaluation because of episodes of apparent inattention. Over the past year, the child has experienced episodes during which he develops a blank look on his face and his eyes blink for 15 seconds. He immediately resumes his previous activity. Which one the following best describes this patient's seizures?
Correct Answer: D
Rationale: Absence seizures, typical in childhood, feature brief (10-20 second) lapses in awareness with staring and eye blinking, followed by immediate resumption of activity, as described. Simple partial seizures preserve consciousness with focal symptoms (e.g., twitching). Complex partial seizures impair awareness longer, with automatisms. Tonic-clonic seizures involve convulsions. Myoclonic seizures cause jerks without staring. The short duration, blank look, and rapid recovery align with absence seizures' EEG pattern (3 Hz spike-and-wave), distinguishing it here.
Question 5 of 5
Which of the following receptor-ligand pathway is TRUE:
Correct Answer: C
Rationale: Insulin acts via tyrosine kinase receptors, not G-protein-coupled receptors, so that's false. Mineralocorticoids (e.g., aldosterone) bind intracellular receptors, not tyrosine kinase, making that incorrect. Vitamin D binds intracellular nuclear receptors, regulating gene transcription, a true statement and the correct pathway. Adrenaline acts via G-protein-coupled adrenergic receptors, not ligand-gated channels, so that's false. Platelet-derived growth factor uses tyrosine kinase, not cytokine receptors. Vitamin D's intracellular action is key to its role in calcium homeostasis, distinguishing it from membrane-bound receptor mechanisms.