2006-10-14 15:44:30 · 5 answers · asked by chelsea 1 in Science & Mathematics ➔ Biology
The way your body excretes water is not by pumping water out of cells, but by pumping out sodium. And due to the concentration gradient generated, water follows by osmosis and chloride follows to keep the charge neutral.
Hence: sodium, chloride and water end up in sweat.
2006-10-14 15:58:28 · answer #1 · answered by Nikoru 4 · 1⤊ 0⤋
Sweating (also called perspiration or sometimes transpiration) is the production and evaporation of a watery fluid, consisting mainly of sodium chloride (commonly known as salt) and urea in solution, that is secreted by the sweat glands in the skin of mammals. Sweat also consists of the chemicals or odorants 2-methylphenol (o-cresol) and 4-methylphenol (p-cresol). In humans, sweating is primarily a means of temperature regulation. Evaporation of sweat from the skin surface has a cooling effect due to the latent heat of evaporation of water. Hence, in hot weather, or when the individual's muscles heat up due to exertion, more sweat is produced. Sweating is increased by nervousness and nausea and decreased by cold. Animals with few sweat glands, such as dogs, accomplish similar temperature regulation results by panting, which evaporates water from the moist lining of the oral cavity and pharynx. Primates and horses have sweat glands in their skin, similar to humans.
You could get more information from the link below...
2006-10-14 23:56:30 · answer #2 · answered by catzpaw 6 · 0⤊ 0⤋
duh
coz perspiration is made up of excess water, oil, and SALTs which the body does not need anymore
our body perspires when we are hot
and when ur sweat evaporates ur body cools down
2006-10-14 17:47:59 · answer #3 · answered by Anonymous · 0⤊ 0⤋
because it contains salts and all kinds of electrolytes.
2006-10-14 17:01:07 · answer #4 · answered by st 3 · 0⤊ 0⤋
because there is NaCl in it
2006-10-14 16:13:39 · answer #5 · answered by weaponsofmass_deception 1 · 0⤊ 0⤋