There are a few electrolyte abnormalities: hypokalemia, hypercalcemia, hyperkalemia and hypocalcemia. Hypokalemia is also referred to as low potassium. The main cause is loss of potassium in urine due to diuretic medicines. Diarrhea and vomiting can also contribute to hypokalemia.
The name of the first camera is camera obscura and is described to be the foundation on which most modern cameras are based on. Johann Zahn made the first camera, in 1685.
The beginning of modern photojournalism took place in 1925, in Germany. The event was the invention of the first 35 mm camera, the Leica. It was designed as a way to use surplus movie film, then shot in the 35 mm format.