You wouldn't be able to enter the fight or flight response and alot more people both past, present, and future would die becasue of it.
Yes, but some people can control it more than others. People get adrenaline rushes when they are anxious/scared/angry, but adrenaline rushes are really tripped when someones pulse exceeds 180 (I'm not for sure about that, but I think so). People who can control their emotions can control their adrenaline rushes better than someone who is emotionally attached, but people emotionally attached will often overuse that adrenaline as well. Don't mistake adrenaline for a typically good thing. Adrenaline often triggers superhuman strength for a brief time, and we would normally be able to use this power when we desired. The problem with this is actually the brain. The brain does not allow you to use this strength for daily use, and adrenaline will keep your brain from thinking straight, and mainly focus on a goal or a rational outcome. It is acting as an emergency brake. If you used that superhuman strength when you wanted, then you would cause serious damage to your body, and that is why adrenaline should only be used when in danger or other necessary times.
Adrenaline rushes, stress, exercise, twitching, panic attacks and such are causes of your pulse being high. Your pulse can also increase when you look at someone you love or like, epilepsi etc. etc.
Then a human would arrive at an asteroid.
The body will decrease production of that substance
Anxiety can cause you to get random adrenaline rushes that seem to appear for no reason. There is also a type of tumor called a pheochromocytoma that causes the periodic secreation of adrenaline. A physician can evaluate the condition and determine the correct diagnosis.
There will be no human
Hyposecretion of adrenaline would result in decreased levels of the hormone in the bloodstream. This can lead to symptoms such as fatigue, low blood pressure, and decreased stress response. Overall, it may impact the body's ability to respond to stress and regulate certain bodily functions.
After 72 hours that human would be severely dehydrated if not dead.
I/you/we/they rush. He/she/it rushes.
The body would die.
he would freeze or sufficate.
Then there would be no human nature.