10 months ago
Last edited at 10:10AM on 2/13/2013
No bananas are good because of the potassium. Potassium is essential for maintaining the cell's membrane potential, which enables nerve impulse transmission. This is an electrical charge that travels along the nerve in response to stimuli, such as pressure, cold or pain. Membrane potential is required for muscles, including the heart, to be able to contract. The peristaltic movement of the intestines requires potassium as well. Cellular enzymes, including pyruvate kinase, require potassium to be able to function. Potassium is also important for maintaining osmotic balance, which preserves proper blood pressure.