The release of which hormone causes simultaneous increase in heartbeat and breathing rate?

The release of adrenaline (also known as epinephrine) causes a simultaneous increase in heartbeat and breathing rate. Adrenaline is a hormone produced by the adrenal glands in response to stress or excitement. When released into the bloodstream, it triggers the “fight or flight” response, which includes increased heart rate and breathing to prepare the body for physical activity or to respond to a perceived threat.