1.   But your muscles are important for more than sending out warning signals.

2.   This type of warning signal is today known as Batesian Mimicry.

3.   When approached underwater they give an alarm or warning signal consisting of a series of quite rapid and quite audible grunts.

4.   She ignored the warning signals.

5.   We overlook all sorts of warning signals about our own health.

6.   The sight of the scummy liquid aroused more warning signals from her stomach.

7.   Whimpering softly, she tried to break away, but his grasp merely tightened on her shoulders, firing warning signals in her brain.

8.   The advice to drivers is to slow down and take heed of the warning signals.