An EMT is confronted by an armed gunman who is threatening to kill the EMT and his partner. An elevation in the EMT's heart rate and blood occurs in which stage of the body's response to stress?

The correct answer is alarm reaction stage.

Explanation:

The alarm reaction stage signifies towards the beginning of the symptoms, which the body encounters at the time of stress. As one knows about the fight or flight response, which is a physiological reaction towards stress. This reaction enables one to either flee or protect oneself in dangerous conditions.

In the condition, the heart rate enhances, the adrenal gland discharges a stress hormone known as cortisol, and one gets a boost of adrenaline that enhances energy. This fight-or-flight response takes place in the alarm reaction stage.