(Mayo Clinic) –– Your body is hard-wired to react to stress in ways meant to protect you against threats from predators and other aggressors. Such threats are rare today, but that doesn’t mean that life is free of stress.
On the contrary, you likely face many demands each day, such as taking on a huge workload, paying the bills and taking care of your family. Your body treats these so-called minor hassles as threats. As a result, you may feel as if you’re constantly under attack. But you can fight back. You don’t have to let stress control your life.
When you encounter a perceived threat — such as a large dog barking at you during your morning walk — your hypothalamus, a tiny region at your brain’s base, sets off an alarm system in your body. Through a combination of nerve and hormonal signals, this system prompts your adrenal glands, located atop your kidneys, to release a surge of hormones, including adrenaline and cortisol.
Adrenaline increases your heart rate, elevates your blood pressure and boosts energy supplies. Cortisol, the primary stress hormone, increases sugars (glucose) in the bloodstream, enhances your brain’s use of glucose and increases the availability of substances that repair tissues. (…)