The action sent a faint fear response through him.

People are also afraid they can't control their own fear response.

The quarry had seen the fear responses of the girl.

"Is there any way to isolate the fear response and block only it?"

The creature's initial fear response had been quite intense, and might take some time to counter.

But 24 hours later, playing the tone elicited no such fear response.

Like other animals, humans come hard-wired with a fear response.

This can create a fear response very easily in a prey animal such as a bird.

It can signal that a threat is present, and trigger a fear response or anxiety.