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.
Cabbage Collars. Unlike other cabbage collars, these are made from copper impregnated material which helps to repel slugs and to deter cabbage root fly. They will prevent weeds germinating around the plant stems and conserve moisture around their roots.