Urinary Session 4- Control Of Sodium And BP Flashcards
1
Q
How much Na is excreted by the kidney and why is this important?
A
Very wide range to match how much was ingested to maintain Na conc in ECF and therefore BP
2
Q
How is plasma volume increased/reduced and why this method?
A
Adding or removing isosmotic solution so plasma osmolarity is unchanged
3
Q
Where is the most sodium and water reabsorbed?
A
Proximal tubule- 65% water and 67% sodium
4
Q
What stimulus alters Na reabsorption in the proximal tubule?
A
Changes in osmotic pressure and hydrostatic pressure in peritubular capillaries
5
Q
Define pressure natriuresis
A
Increased urinary excretion of sodium and water due to increased arterial pressure
6
Q
Define pressure diuresis
A
Increased urinary excretion of water due to increased arterial pressure
