Final answer:
To provide care as an EMT, one must operate under the authority of a service medical director, who is responsible for overseeing the medical aspect of the EMT's service.
Step-by-step explanation:
As an EMT (Emergency Medical Technician), the requirement that must be met to provide routine and emergency medical care to the sick and injured as an extension of the medical director's authority is A) A service medical director. EMTs work under the direction of a medical director, who oversees the medical aspects of the care EMTs provide. The medical director ensures that EMTs are following protocols and administering care appropriately. EMTs and paramedics have significant training, including courses related to anatomy, physiology, medical terminology, and chemistry. This training prepares them to handle a range of emergency situations while making critical decisions under pressure.
To become a paramedic, which is the next step after becoming an EMT, one needs 2-4 years of training, and prior EMT experience is usually required. Paramedics are trained to administer a wide variety of emergency drugs and have a broader scope of practice. However, both EMTs and paramedics rely heavily on the medical director's guidance and authority to provide the best patient care during emergencies.