Impulse is the effect of a certain emotion, mental state, etc., acting on an impulse of generosity; to attack someone out of anger. Impulse is a rapid, instinctive urge to act, to be influenced by impulse. An example of this is a psychological or spontaneous impulse.
The signal delivered along a nerve fiber is an impulse. Dendrites, the specialized ends of nerve cells, sense any environmental change as a message. Dendrites exist within the sensory organs. The collected message triggers a chemical process that generates an electrical impulse.
The act of compelling or forcing forward with rapid power; impulsion; particularly, the transmission of force in such a way as to generate sudden or instantaneous motion. Mechanical impulses perform all animal movements.
Impetus is mental energy that merely and immediately urges to action; rapid inclination; sudden motivation; the temporary or fleeting influence of desire or passion; propension; instigation; as a man of excellent impulses; passion frequently imparts a violent impulse to the will.
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