It All Starts With The Brain

Just think, the next time you are about to have sex, do you feel your heart beating faster?, yourself feeling a little hotter, even though the temperature in the room is the same and even though certain parts of your are not being overly stimulated by touch, you are suddenly very aware of them!


This can also happen just by sitting in a chair doing nothing, suddenly you have a thought to do with feeling angry or sad and suddenly your pancreas secretes some hormone. Your pancreas? How did you manage to do that with your pancreas? I bet you don't even know where your pancreas is! LOL


Your liver is making an enzyme that wasn't there before, your spleen is text-messaging something to your thymus gland, blood flow in little capillaries in your ankles has just changed, all from a thinking thought!


I think we all kind of know the brain can regulate functions throughout the body, but it is still mind blowing to be reminded of how far-reaching the effects can be.


Hormones and stress response


As the master gland, the brain can experience or think of something stressful and activate components of the stress response hormonally.


Two hormones vital to the stress response are epinephrine (Adrenaline) and norepinephrine (noradrenaline), released by the sympathetic nervous system. Another important class of hormones in the response to stress are called glucocorticoids. (Glucocorticoids are steroid hormones), steroid is used to describe the general chemical structure of 5 classes of hormones, Androgens the famed "anabolic" steroids like testosterone - estrogens, progestins, mineralocorticoids, and glucocorticoids, they are secreted by the adrenal gland and they often act in similar ways to to adrenaline.


Adrenaline acts within seconds; glucocorticoids back this activity up over the course of minutes or hours.


When something stressful happens or you think a stressful thought, your brain secrets an array of hormones into the circulatory system that gets the ball rolling.


In addition, in times of stress your pancreas is stimulated to release a hormone called glucagon. Glucocorticoids, glucagon, and the sympathetic nervous system raise circulating levels of the sugar glucose. These hormones are essential for providing energy during stress.