reflex

But when a serial sex predator is playing fanboy, the gag reflex kicks in.

Worry has become as automatic a reflex as breathing in your sleep.

Then came the moment when a reflex born of a lifetime with a badge caused him to check the door window at the end of the car.

He is quite a bundle of stimulus and reflex, with no reflection.

The term Affluenza caused a national gag reflex—and as a doctor I can assure you that, no, Affluenza is not a real affliction.

Even if I were to be shot, the reflex action of my fingers would pull the trigger of this revolver and McGinty will die.

The reflex excitability is lowered and the sensibility diminished.

It came, I think, out of just such an automatic reflex as causes an "opening" in conversation to call forth its own obvious reply.

The reflex action on his sensitive mind first stunned, and then warped his senses.

Such a physiological relation of things is termed reflex action.