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.
Blue-collar workers perform labor jobs and typically work with their hands. The skills necessary for blue-collar work vary by occupation. Some blue-collar occupations require highly skilled personnel who are formally trained and certified.
Sometimes you may have to take a blue collar job if the economy is down and white collar jobs are hard to find. 17 people found this helpful The world is made up of many workers that spend all day in offices however there is just as many blue collar workers that spend their days outside working with their hands.