Philosopher's Stone

Physiology

3 chunks

Oral Rehydration Solution vs Plain Water

Plain water alone is the wrong replacement fluid during active GI losses — it can cause hyponatremia. Oral Rehydration Solution combining water, glucose, sodium, and potassium exploits sodium-glucose cotransporters in the gut and is one of the most lives-saved medical interventions of the 20th century.

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Vomiting and the Renal Potassium Cascade

Most potassium lost during repeated vomiting does not come from the vomit itself — it comes from the kidney dumping potassium over days as a side effect of metabolic alkalosis, volume depletion, and aldosterone activation. This is why simple oral potassium supplementation cannot fix the deficit.

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Thermoneutral Zone: Why 'Nude TNZ 27-31°C' Sounds Impossibly Warm

The textbook {{thermoneutral zone}} assumes nude, at-rest, still-air conditions; clothing, metabolic heat, body fat, and habituation shift real-world comfort down 8-12°C.

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