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Stress and Your Body
Imagine you're in bed sleeping and all of a sudden your fire alarm starts going off... you forgot to blow out your candle before you went to sleep!
Your heart starts beating fast and your breathing increases, what is happening is called a stress response. Let's take a closer look at whats happening ...
The pituitary gland in the brain sends the hormone "Acetylcholine" through the bloodstream to the adrenal gland. The adrenal gland then releases epinephrine and norepinephrine that go through the blood stream to the heart and other organs. These hormones will stimulate important organs such as the heart and lungs to work faster whereas they will halt the work of the immune system and excretory system.
At the same time, Neurotransmitters called Ach(Acetylcholine) are sent through the cervical spine to the ganglii and crosses the Synapse to stimulate action potential through to the postganglionic fibres and neurons that carry the action potential to your legs so that you can run fast away from the fire. At the end of the postganglionic fibre there is also Norepinephrine released to the blood vessels to say “open wide to let more blood in”
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