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Question

ORAL rehydration solution (ORS) combats dehydration by providing:

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1. **Dehydration**: Usually caused by diarrhea or vomiting, leading to loss of water and essential electrolytes.
2. **Sodium-Glucose Co-transport**: The absorption of Water and Sodium ($Na^+$) in the small intestine is significantly enhanced in the presence of **Glucose**.
3. **ORS Composition**: It contains a precise mixture of: 
   - **Salts**: $NaCl$ (Sodium chloride), $KCl$ (Potassium chloride), and Trisodium citrate.
   - **Glucose**: Provides energy and facilitates the transport of salts.
4. **Function**: This combination helps the body reabsorb fluids quickly and restores electrolyte balance. Pure water or pure glucose are not as effective for rapid rehydration in clinical diarrhea cases.

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