Final answer:
A tiered response system in EMS involves dispatching different levels of medical personnel and resources based on the severity of the patient's condition.
Step-by-step explanation:
In the context of Emergency Medical Services (EMS), a 'tiered response' refers to a system in which different levels of medical personnel and resources are dispatched based on the severity of the patient's condition. This approach ensures that patients receive the appropriate level of care in a timely manner. For example, in a tiered response system, a basic life support (BLS) unit may be dispatched for less critical situations, while an advanced life support (ALS) unit may be sent for more severe cases.