An action potential is a very rapid change in membrane potential that occurs when a nerve cell membrane is stimulated. Specifically, the membrane potential goes from the resting potential (typically -70 mV) to some positive value (typically about +30 mV) in a very short period of time (just a few milliseconds).n action potential is a very rapid change in membrane potential that occurs when a nerve cell membrane is stimulated. Specifically, the membrane potential goes from the resting potential (typically -70 mV) to some positive value (typically about +30 mV) in a very short period of time (just a few milliseconds).
Definition of astute - having or showing an ability to accurately assess situations or people and turn this to one's advantage Definition of astute - having or showing an ability to accurately assess situations or people and turn this to one's advantage
Word Origin and History for astute Expand adj. 1610s, from Latin astutus crafty, wary, shrewd; sagacious, expert, from astus cunning, cleverness, adroitness, of uncertain origin, perhaps from Greek asty town, a word borrowed into Latin and with an overtone of city sophistication (cf. asteism). Related: Astutely; astuteness.