Want this question answered?
To React
Yes
Irritability
Competence is the ability of a cell by which it can respond towards a signal.
neurons and muscle cells
To React
Adaptation/Evolution
Sensitivity or stimulant
It can be either one, depending on your meaning. You would "respond to" a question or comment directed at you. You would "respond for" someone else who cannot respond for themselves.
Stimulus Discrimination?
the ability to respond in a nick of time
excitability
Imunocompetent
irritability
Yes
Irritability
like this.