Plasma osmolarity increases when you give a severely dehydrated person large amounts of pure water.
The electrolyte–water balance of the body is measured by plasma osmolality. This amount can be determined in a variety of ways, including measurement and computation.
Osmolality and osmolarity are two separate measurements that are used interchangeably in everyday situations.
When you are dehydrated, osmolality rises, and when you have too much fluid in your blood, it drops.
The way your body regulates osmolality is unique. When your body's osmolality rises, your body produces antidiuretic hormone.
Hence,plasma osmolarity increases when you give a severely dehydrated person large amounts of pure water.
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