snímek PPT
i – although body dehydration may be considerable with the loss
of hypotonic fluids, loss of circulating volume used to be
negligible in this condition (loss of water is compensated in
90% from stores outside the circulating volume)
j – if the water loss is much higher than loss of salt, NaEC lowering
may be attended by PNa rise
k – an organismus has lost salt and water massively, it tries,
however, to maintain predominantly the volume by the quick
feedback by means of thirst and ADH in this extreme situation
(salt losses are compensated only by drinking); it succeeds only
partially, however, and it is paid by hypotonicity (a trade-off
l – Na in urine < 10mmol/L
m – Na in urine > 20 mmol/L – the urine itself is effective in
n – with a small urine volume Na in urine > 600 mmol/L