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Kaplan Qbank USMLE



Author6 Posts
  #1

sweating is hypotonic loss or isotonic loss?

  #2

hypotonic loss

  #3

yes thts wht the book says but i can never understand it to be hypotonic loss,as there is loss of water & salt,it should be isotonic loss,as during sweating we r always recommended to drink salt dissolved in water,if it is hypotonic then only water should help to replace the loss....can u explain it to me plz?

  #4

Most sweat glands are eccrine glands and Eccrine sweat is an ultrafiltrate of plasma forming a colorless, hypotonic solution that is 99% water and 1% solutes including sodium, chloride, potassium, calcium, urea, ammonia, uric acid and phosphorus. Aldosterone increases the reabsorption of sodium from sweat.
So sweat is hypotonic not isotonic and i ve never heard recommended to drink salt dissolved in water when sweating :roll: :wink:

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  #5

i agree with alice ,but whts your reference text for this?

  #6

hi oddissy4u smiling face
reference source for all these above are some web pages i ve searched for sweating glands...
i find the knowledges from both american academy of dermatology (www.aad.org) and www.sweating.net...and read lots of other pages from different web sites telling that sweat is hypotonic solution... smiling face :oops:

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