Emergency Medical Technician (EMT) Intermediate Practice Exam

Which of the following physiologic responses is common during an acute stress reaction?

1. Decreased heart rate

2. Increased blood glucose levels

3. Lowered blood pressure

4. Decreased respiratory rate

The correct answer is: Increased blood glucose levels

The correct response is that increased blood glucose levels is a common physiologic response during an acute stress reaction. When the body experiences acute stress, it enters a state often referred to as "fight or flight." This response is mediated by the release of hormones such as adrenaline and cortisol. Adrenaline increases blood flow to muscles and raises energy availability by promoting the release of glucose from liver stores into the bloodstream. This mechanism is essential for providing the body with the immediate energy needed to deal with a perceived threat or danger. Additionally, cortisol maintains elevated glucose levels to ensure that the body has sustained energy for prolonged stress responses. This physiological reaction is crucial because it prepares the body to respond to emergencies effectively, enhancing alertness, strength, and ultimately survival in the face of acute stressors.