CHOLERA: Why does the loss of sodium ions in from the epithelial cell lead to the loss of water and diarrhoea?

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Iv'e tried to sentence an asnwer for this question but I always end up talking about chloride ions. Can anyone help?

Posted Thu 1st November, 2012 @ 16:12 by ameera

3 Answers

  • 1 vote

Sodium ions move out of the epithelial cell, lowering the water potential so water moves into the small intestine due to osmosis.. hence water loss and diahorea

Answered Thu 1st November, 2012 @ 16:15 by Edward Pinches
  • 1 vote

You need to talk about the water potential change, this change leads to a concentration gradient leading to the loss of sodium ions, which then catalyses the loss of water in the body. Depending on the exam board you are on, the phrasing of the answer you have to give differs. So make sure you take all of this into consideration!

Answered Thu 1st November, 2012 @ 16:17 by Nadine
Edited by Nadine on Thu 1st November, 2012 @ 16:17
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Answered Thu 1st November, 2012 @ 17:15 by ameera