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.
In many respects, cameras were developed, rather than having been invented by just one person. In 1685, Johann Zahn described, but could not build, a magic lantern device that would capture images. Nicephore Niepce used bitumen to create the first actual photograph in 1825.