A 79-year-old man undergoes a hip replacement procedure under general anesthesia and is unable to be weaned from the ventilator postoperatively. Review of the anesthesia records indicated that he received the following agents: succinylcholine, diazepam, rocuronium, and fentanyl. He spends the next 5 days on a ventilator in the intensive care unit. Which of the following is the most likely explanation for this situation?

A 79-year-old man undergoes a hip replacement procedure under general anesthesia and is unable to be weaned from the ventilator postoperatively. Review of the anesthesia records indicated that he received the following agents: succinylcholine, diazepam, rocuronium, and fentanyl. He spends the next 5 days on a ventilator in the intensive care unit. Which of the following is the most likely explanation for this situation?

Five patients present to their primary care physician with various complaints and problems. Which of the following patients would have the most limited response to their symptoms if given a prescription for diazepam?

A 52-year-old man who depends upon his three cups of coffee per day, which he purchases at his place of work, suddenly finds that the coffee stand has closed. He now is unable to drink his three cups of coffee per day. Which of the following effects might he exhibit at work?

A 53-year-old woman with seizure disorder, bipolar disorder, and trigeminal neuralgia presents to her primary care physician for follow-up and treatment. She has no new complaints. Which of the following medications may serve to treat all of her earlier mentioned problems?

A 59-year-old man presents to his primary care physician with an extremely sore shoulder following an accident at work. He is not found to have any fractures or tears and is treated with an injection of prednisolone for bursitis. He smokes and is currently taking levothyroxine because of a thyroidectomy, a β-blocker for mild heart failure, and prazosin for benign prostatic hyperplasia. His medications and the nicotine in his cigarettes each act on a different receptor. Activation of which of the following receptors produces the fastest cellular response?