Which of the following foods will have the greatest impact on the heart's conductivity of the person consuming it?
1. A pickle
2. A banana
3. A milkshake
4. A spinach salad
ANS: 2
Potassium is the major electrolyte and principal cation in the intracellular compartment. It regu-lates many metabolic activities and is necessary for glycogen deposits in the liver and skeletal muscle, transmission and conduction of nerve impulses, normal cardiac conduction, and skeletal and smooth muscle contraction. Bananas are a high-potassium food. The remaining options are good sources of sodium, calcium, and magnesium.
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