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.
15 High-Paying Blue Collar Jobs 15 High-Paying Blue Collar Jobs The Bureau of Labor Statistics (BLS) defines blue collar and service occupations as including âprecision production, craft, and repair occupations; machine operators and inspectors; transportation and moving occupations; handlers; equipment cleaners, helpers, and laborers; and service occupations.â