What is the body trying to accomplish when you’re about to pass out? (Adrenaline rush, lightheadedness, loss of vision)
In: Biology
Adrenaline rush is not akin to a fainting episode. Adrenaline is an hormone that promotes the fight or flight response. It prepares your body to either run or fight. That means it stop digestion with promoting blood to your lungs, heart and muscles. Coming off that is when your system is returning back to normal. Like something under tension returning to normal. It might feel like you are going to collapse, but it’s more you are securing more oxygen.
Fainting is when there is not enough blood getting to your brain. This can happen for multiple reasons and if fainting episodes is an regular occurrence should be checked out by a doctor. When your brain doesn’t get enough oxygen, it becomes starved and will not be able to do something. Like trying to get a car to run without it having an fuel in the tank. Lying down, and putting your heart and head level, is to stop the effects of gravity.
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