The curious: What potassium does to the body.

I saw this on First bank Instagram page some time back, though it wasn't as detailed as this but that was the source of the inspiration...
Potassium is a mineral necessary for the proper function of many of your body systems;
it's also often referred to as one of the key electrolytes in your body. Potassium, along with sodium, the other electrolyte, plays a vital
role in regulating the fluid levels in your body.
Potassium has many roles and responsibilities within your body, these responsibilities include:
- Maintains the electrolyte balance in your body's cells
- Manages your blood pressure and keeps your heart functioning properly
- Assists nervous system by aiding in the correct function of tissues needed for sending nerve impulses
- Helps the muscles contract
- Releases energy from protein, fat and carbohydrates during the metabolic process
- Aids in the waste removal process
- Enhances muscle control, the growth and health of your cells
- Promotes efficient cognitive functioning by helping to deliver oxygen to the brain
Effects of Deficiency of Potassium
Dietary deficiency of potassium can lead to variety of mental and physical problems for you. Mental symptoms can include insomnia, anorexia, depression and some nervous
disorders. Physical symptoms include muscular cramps and twitching, fatigue, muscular weakness, poor reflexes, irregular
heartbeat and other cardiovascular problems, fragile bones, lung and kidney failure and heart attack. If you experience any combination of these symptoms, you should speak with your doctor immediately.