Final answer:
The incident commander is the one responsible for requesting extra supplies and staffing in a hospital during disaster planning.
Step-by-step explanation:
In the context of disaster planning at a hospital, the individual who should be expected to request extra supplies and staffing for the facility is the incident commander. The incident commander is responsible for the overall direction of the emergency response, including resource allocation, which entails securing additional medical supplies and ensuring sufficient staffing in preparation for the anticipated demand on the healthcare facility. In contrast, the roles of other individuals, such as the medical command physician, triage officer, and media liaison, cater to specific aspects like on-site medical oversight, prioritization of patient care based on injury severity, and communication with the public and press, respectively.