The patient with a brain neoplasm is combative and cursing at the staff. The family reports that this is a drastic change in the patient's personality. The nurse suspects the tumor is in which lobe of the patient's brain?

The older adult patient is brought to the emergency department with sudden onset confusion, agitation, and hallucinations. The patient's past medical history is significant for type 2 diabetes managed with glyburide, anxiety managed with lorazepam, and insomnia managed with zolpidem. Upon assessment, the patient's heart rate and rhythm are regular, lungs are clear to auscultation, and bowel sounds are present. Vital signs are normal, with exception of a slightly elevated heart rate. Which is the most likely cause of the patient's symptoms?

The patient with social anxiety disorder asks the nurse to explain why she feels the way she does in social situations. The nurse bases the response on which understanding of the pathophysiology of anxiety disorder?