Can we drink Seawater?


Imagine you’re stranded on a desert coastline
and facing dehydration. If you don’t get water, you’ll perish.
Do you think drinking Sea Water will be a good idea? Well, let’s see how our bodies absorb water. You may remember the process of OSMOSIS in
which molecules of a solvent tend to pass through a semipermeable membrane from a less
concentrated solution into a more concentrated one. A concentrated solution is one that contains
a relatively large amount of solute. In case of sea water, salt is the solute and water
is the solvent. Normally, the saltiness of water in your cells
is the same as the saltiness outside your cells. This is called an isotonic state. But when you drink water, a concentration
difference takes place. And water from the outside moves into your cells to maintain
equilibrium or balance. This is called osmoregulation. What if you drink too much Sea Water? If you drink too much sea water, the salinity
outside your cells will increase rapidly forcing too many water molecules to move out of your
cells. So even if you are already dehydrated, your
cells will release water rather than absorbing. And so drinking sea water is actually a bad
idea! What if you drink too much pure water? If you drink too much pure water, the salinity
outside your cells will decrease rapidly forcing too many water molecules to move into your
cells. This may cause the cells to swell and burst
which may result in quick death. It’s ironic that you can literally kill yourself
with just …pure ..water.  [should sound like an ending line] Hey, if you would like to see more videos
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