20 Mar impulse
1) Shoppers buy things they do not need on impulse, a kind of irrational attraction.
2) The auxiliary power system in a star ship produces impulse power.
3) In Neuroscience impulse normally refers to an electrical charge of action potential that flows in the brain. Impulses can be positive (excitatory) or negative (inhibitory).
Keywords: quantal release
References: brain physiology