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.)
Operational Definition â A definition in terms of the operations used to produce and measure a phenomenon. It is important to define a behavior in clear and concise terms so that it can be accurately measured, assessed and treated by a number of individuals across a variety of environments.here are four functions of behavior 1) attention 2) sensory/automatic 3) to access a tangible/edible item and 4) to escape a particular person, place or activity. Extinction-The withholding of reinforcement. Removal of reinforcement that decreases a behavior would be considered a negative punisher NOT extinction.