that contracts rapidly, in 10 seconds or less, by .5mm or more, when bombarded by electrons as from a cathode ray tube? or expands? could either be living tissue or dead organic matter. thanks!
I think your question is a bit specific, but piezoelectric organic substances do exist. There was a paper in nature that researchers at Berkeley published.
Please see the following journal article: http://www.nature.com/nnano/journal/v7/n6/full/nnano.2012.69.html#affil-auth
Also see the following public article: http://www.extremetech.com/extreme/129389-berkeley-scientists-turn-harmless-virus-into-piezoelectric-generator
I don't know if it would contract by the amount that you are after, but bone (which has both organic and inorganic components) is piezoelectric.
For an overview, see http://silver.neep.wisc.edu/~lakes/BoneElectr.html.