Urinary System Flashcards
What is the functional unit of the kidney?
Nephron
What is the function of the urinary system?
pH, fluid, electrolyte regulation
Liquid waste elimination
What connects the kidneys to the urinary bladder?
Ureters
What stores urine?
Urinary bladder
When leaving the bladder, what does urine go through?
Urethra
The ion balance and excretion is accomplished by a _______________ mechanism in the nephron.
Countercurrent
Blood is filtered at the __________ ________ such that particles smaller than ______ molecular weight pass into tubule system, most of which will be selectively reabsorbed in the convoluted tubules.
Glomerular capsule
70,000
The distal wall of Henle’s loop (ascending limb) then actively transports ____ ions (Na+ follows passively) out of the tube and into the surrounding _________ (peritubular) fluid.
Cl-
Interstitial
The relatively high _____ concentration draws water out of the tube (esp collecting ducts), thereby ______ the concentration of urine left behind.
Salt
Increasing
The salt ions are then transported back into the descending limb of the loop, thus _______ the urine dehydrating/concentrating power of the loop.
Multiplying
The countercurrent term identifies that descending limb fluid is flowing in a direction _______ that in the ascending limb, which allows for the recycling of _______.
Opposite
Ions
Countercurrent multiplier mechanism allows for urine to be concentrated up to ______ times normal plasma levels
Ten
Blood goes out to the ______ and then down into the ______ to be filtered
Cortex
Medulla
Kidneys produce what 2 chemicals?
Erythropoieten and renin
What effect does aldosterone have on the kidneys?
Retains sodium
How does blood get into glomerular capsule?
Capillary have holes in them that “bleed” - comes in at a high blood pressure
Only the _______ actually makes it through glomerular capsule
Plasma (at 300 mOsm)