ATI RN
Central Nervous System Stimulants and Related Drugs NCLEX Style Questions Questions
Question 1 of 5
A 7-year-old boy is brought to the emergency department by his parents after being stung by a bee. The parents say that he is allergic to bee stings, and the patient is having great difficulty breathing. Epinephrine is administered immediately. His symptoms improve as molecules of epinephrine bind to β\(_2\)-receptors in bronchial smooth muscle. Which of the following describes a feature of β\(_2\)-receptors?
Correct Answer: A
Rationale: β\(_2\)-adrenergic receptors are G-protein-coupled receptors that have seven transmembrane domains, which is a characteristic feature of this receptor family.
Question 2 of 5
A woman enters your clinic with an enlarged thyroid and you suspect simple adenomatous goiter. Which of the following would be the best treatment if the laboratory results shows low levels of free T3 and T4?
Correct Answer: D
Rationale: Levothyroxine (choice D) treats hypothyroid goiter (low T3/T4) by replacing thyroid hormone, shrinking the gland. TSH infusion (choice A) worsens it, Propranolol (choice B) manages hyperthyroid symptoms, Propylthiouracil (choice C) reduces hormone in hyperthyroidism. Levothyroxine is appropriate.
Question 3 of 5
Epinephrine HCl has little or no effect on
Correct Answer: A
Rationale: Epinephrine is poorly absorbed through unbroken skin but is effective on mucosal surfaces.
Question 4 of 5
A physician has a choice in benzodiazepines to prescribe for patients. A particular patient (a 53-year-old man with anxiety) has a difficult time with compliance to medications. The physician is concerned about the patient going into withdrawal because of abrupt discontinuation of the antianxiety medication. Which of the following medications would have the least severe withdrawal reaction?
Correct Answer: A
Rationale: Diazepam has a long half-life, which reduces the risk of severe withdrawal symptoms compared to shorter-acting benzodiazepines like triazolam.
Question 5 of 5
Following mediators are involved in acute inflammation except
Correct Answer: C
Rationale: Interferons are involved in antiviral defense and immune modulation, not acute inflammation.