water balance Flashcards
How much fluid do the glomeruli filter a day
180L/day
What are the main components of urine
What are the other components
water
urea
bilirubin and creatinine
What is the pH of urine
4.6-8
What are the trace amount of proteins that are found in urine
What does it do
Where is it made
uromodulin
Binds to bacteria
loop of henle
What is the primary driver of osmosis
What is the driver of fluid movement in ECF
What is the driver of fluid movement in ICF
Osmolality
Na+
K+
What is tonicity
the ability of a solution to affect the fluid volume and pressure in a cell
How does the body maintain tonicity
intact thirst
maintain GFR
functional LOH & distal nephron
functional ADH
ADH response from kidney
What maintains intravascular volume/osmolality
Albumin
When is ADH released in regards to osmolality
If osmolality is increased
AKA too much sodium
What are the ICFV components
sodium
potassium
magnesium
urea nitrogen
How much urine MUST be released a day to remove waste
400mL
What lab gives a measure of GFR
CrCl
What are the 3 factors that regulate water in the body
RAAS
ADH
metabolic demands
What regulates sodium concentrations in the body
RAAS
ADH
What primarily determines fluid balance in the body
blood pressure
