Definition for programmed cell death : apoptosis: a type
of cell death in which the cell uses specialized cellular machinery to kill itself; a cell suicide mechanism that enables
metazoans to control cell number and eliminate cells that threaten the animal's survival. http://wordnetweb.princeton.edu/perl/webwn%3Fs%3Dprogrammed+cell+death
Cell signaling and cell signals Signal Transduction, Transduce Direct
signal transduction Signal Execution Hormones http://en.wikipedia.org/wiki/Hormones Growth Factor Nitric Oxide=NO Cytokine Glucocorticoid Dead Cell
Removal Mitochondria Mitochondria regulation
