How does adrenaline affect blood flow in the body?

Adrenaline, also known as epinephrine, plays a crucial role in the body's fight-or-flight response. When released into the bloodstream, adrenaline primarily causes vasodilation in certain areas while inducing vasoconstriction in others. This results in an increase in blood flow to vital organs, such as the heart, brain, and muscles, to prepare the body for rapid action. The body's priority shifts during stressful situations, necessitating heightened blood supply to essential areas that support immediate survival and physical performance.

In contrast, blood flow to non-essential systems, such as the digestive system, is reduced during times of stress. This redirected flow ensures that the body can respond effectively to perceived threats. Consequently, adrenaline enhances the delivery of oxygen and nutrients to areas that are critical for survival, thereby enabling a faster and more efficient metabolic response in vital organs.