Examples of homeostasis include the regulation of body temperature, the pH of extracellular fluid, or the concentrations of sodium, potassium and calcium ions as well as that of glucose in the blood plasma, despite changes in the environment, diet, or level of activity.
DEFINITION of 'White Collar'. A working class that is known for earning high average salaries and not performing manual labor at their jobs. White collar workers historically have been the shirt and tie set, defined by office jobs and not getting their hands dirty (or their white collar dress shirts). This class of worker stands in contrast to blue collar workers, who traditionally wore blue shirts and worked in plants, mills and factories. Next Up.
BREAKING DOWN 'Blue Collar'. The term blue collar has in the past implied a certain lack of worker education as well, but those lines are blurred today. Today blue collar workers can be formally educated, skilled and highly paid. They can also earn more annually then some of their white collar counterparts. The rate of college attendance in the U.S. has skyrocketed in the past 100 years, democratizing the education level once reserved for only wealthy families.