How is sweat useful for us?

Removal of lactic acid

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Removal of Sodium chloride

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Helps us cool down

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All of the above

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Solution

The correct option is D All of the above
Sweat removes salts and lactic acid along with water so when it evaporates it cools us down. Sweat glands pass out sweat only when required. This is the reason why we sweat more in summers than in winters.

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