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Should a man, trapped in an isolated island, consume sea water to quench his thirst? The answer is NO. 心. To drink sea water to quench the thirst will cause rapid dehydration. This may lead to death. 中 习 补 This is because the sea water is very hypertonic compared to the 贵 concentration of our body fluid. 锦 汪 When a man drinks sea water, the sea water that flows through 6 1 his digestive tract will cause the blood capillaries found on the 0 2 wall of digestive tract, to lose water through exomosis to the sea water. This is because the concentration of blood plasma is ) C hypotonic compared to the sea water in the digestive tract. ( t h g i As a result, the man experiences dehydration as his blood loses r y water to the sea water in the digestive tract. p o C The blood cells and other body cells will also be experiencing crenation and die too. Contact iTuition: 019-478 4930 - Tan 016-712 6703 - Cruz 016-443 7048 - Koay Therefore, the man should not consume sea water even though he is very thirsty. (He may consume his own urine as the concentration in urine is not so hypertonic compared to that of sea water.)