Review Question - QID 110033

A 23-year-old man presents to a psychiatrist for evaluation of situational anxiety. He reports that he recently started a new job that involves regular public speaking and is very stressed before every public speaking event. He describes developing a rapid heart rate and diaphoresis that interferes with his ability to speak well. He has no past medical history and takes no medications. He does not smoke or drink alcohol. His temperature is 98.6°F (37°C), blood pressure is 110/65 mmHg, pulse is 85/min, and respirations are 17/min. On exam, he is well-appearing and appropriately conversational. He is alert and fully oriented. The patient is prescribed propranolol to take before major public speaking events. Which of the following physiologic changes will occur when the patient takes this medication?