Interferes with sodium reabsorption at distal tubule, resulting in increased water and sodium excretion and decreased potassium excretion. Increases chloride, sodium, and water excretion by interfering with transport of sodium ions across renal tubular epithelium.
The main purpose is to grab people's attention. Once it has achieved that purpose, its next purpose is usually to provide people with information. Sometimes posters are designed to make people curious about something, and encourage them to seek out further information of their own accord. TouchScreen Â· 7 years ago.
The purpose of the school bus sign and hazard warning lights is to make other road users aware that when the vehicle is stationary children are likely to be getting on or off the bus and may be crossing the road. Other road users should, therefore, be very cautious when passing a school bus in those circumstances.