A reaction time is born but is made at the same time. While you
grow older and use your reaction more, your reaction time will
become faster and better.
So, your reaction time isn't born nor made.
View page
Reaction time
View page
Fear can improve (shorten) reaction time.
View page
Alligators have a reaction time of 50 milliseconds. This
reaction time is most likely enabled by their super sensitive
skin.