Emergency medical training is not only about what firefighters can do to assist a patient in crisis; it is also about recognizing what is beyond an individual firefighter's training and ability.

Which of the following accurately describes insulin?

A) Pill that must be taken by diabetic patients B) Hormone that breaks food into simple sugar C) Drug that increases the sugar in the blood D) Hormone that enables glucose to move into the cells

A patient with atherosclerotic heart disease experiences chest pain during exertion because the:

A. coronary arteries suddenly spasm and cause a marked reduction in myocardial blood flow. B. lumen of the coronary artery is narrowed and cannot accommodate increased blood flow. C. tissues of the myocardium undergo necrosis secondary to a prolonged absence of oxygen. D. ragged edge of a tear in the coronary artery lumen causes local blood clotting and arterial narrowing.