Someone sneaks up behind you and shouts, “Boo!” For a few seconds your heart beats faster. You did not run or do any physical activity that would increase your heart rate. What caused your heart to beat so fast?
Whenever you get scared or nervous you get those butterflies-in-your-stomach kind of feeling. That effect is called an Epinephrine or another word for it would be adrenaline. Epinephrine triggers the ‘fight’ or ‘flight’ response. Meaning it gives you an extra energy needed to fight back or run away in a situation. Epinephrine, however, only triggers the effect when it gets in contact with a whole cell. It doesn’t actually get inside the cell.
Whenever you get scared or nervous epinephrine gets in contact with a whole cell triggering that mode in which you gain extra energy to make action. Whether it’s to flee or stay and fight back. Your heart beats fast because while the adrenaline pumps through your blood, fat and sugar open the bronchi more wide making your breathing heavier and heartbeat go faster.
Thanks for reading this essay. I hope you learned something from it. I hope you have a great rest of your day and I’ll be posting more soon.