Residential Care / Assisted Living: What Is Residential Care for the Elderly? Residential Care Facilities for the Elderly (RCFE) serve persons 60 and older. They provide room, board, housekeeping, supervision, and personal care assistance with basic activities like personal hygiene, dressing, eating, and walking.
A potassium test is used to measure the amount of potassium in your blood. Potassium is an electrolyte important for the functions of cells.
Guide. A potassium test checks how much potassium is in the blood. Potassium is both an electrolyte and a mineral. It helps keep the water (the amount of fluid inside and outside the body's cells) and electrolyte balance of the body.Potassium is also important in how nerves and muscles work.otassium levels can be affected by how the kidneys are working, the blood pH, the amount of potassium you eat, the hormone levels in your body, severe vomiting, and taking certain medicines, such as diuretics and potassium supplements.