What if your heart rate and breathing quickenand you have a sudden burst of emergencyWhich endocrine gland causes this reaction?

The sudden increase in heart rate and breathing, often experienced during an emergency, is primarily triggered by the adrenal glands. Specifically, the adrenal medulla releases adrenaline (epinephrine) into the bloodstream, which prepares the body for a "fight or flight" response. This hormone increases heart rate, enhances energy availability, and improves oxygen delivery to muscles, enabling a quick reaction to the perceived threat.