Final answer:
Health professionals showing minimal facial expressions exemplify emotional restraint and a professional demeanor to maintain a supportive environment for patients.
Step-by-step explanation:
Showing minimal facial expressions when sensitive diagnoses are shared is an example of emotional restraint or maintaining a professional demeanor. Health professionals often adopt a neutral expression to provide support without influencing a patient's emotional response. It's part of their training to exercise emotional regulation in clinical settings, which requires controlling one's own expressions and reactions to maintain a therapeutic environment for the patient.