Causes. Acute liver failure is most often caused by infectious agents or toxins, poor flow of fluids into the liver and surrounding tissues (perfusion), hypoxia (inability to breathe), drugs or chemicals that are destructive to the liver (hepatotoxic), and excess exposure to heat.
Definition of operate for English Language Learners. : 1  to function or behave in a proper or particular way. : 2  to use and control (something) : 3  to have control of (something, such as a business, department, program, etc.)
Best Answer: An operational definition is a very specific definition used in an experiment, to ensure that all of the researchers collecting data are watching for the same thing. Say you are doing an experiment on altruism where you pretend to trip down some stairs or something and to see if people help you.