Overview of Renal Physiology Flashcards
What are the three processes performed in sequence by the nephron?
- glomerular filtration
- tubular reabsorption
- excretion
Most (i.e. >99.9%) of the water filtered at the ______ is reabsorbed in the tubule.
glomerulus
What is excretion?
excess regulated substances that are passed through the tubule to be eliminated
This is the process of eliminating excess regulated substances by passing them through the tubule.
excretion
The kidneys receive ____% of the cardiac output.
25
What is the filtration fraction?
the amount of the plasma flow that is filtered at the glomerulus into the start of the tubule
The bodily fluids may be divided into the ______ and ______.
cellular compartment; the extracellular fluid
Interstitial fluid accounts for ____ out of the total body fluid volume.
12L
The level of renin is rate-limiting for the production of _______.
angiotensin II
This is selective recapture of filtered components within the tubule.
tubular reabsorption
What is the volume of the intracellular fluid?
27L
This hormone causes arteriolar smooth muscle constriction to increase BP.
angiotensin II
_______ is an epithelial transport process that involves the movement of substances from the blood or blood side of the tubule into the tubular lumen.
Secretion
The kidneys play a hormonal role in the regulation of blood pressure by regulating the circulating levels of the potent vasopressor, _______.
angiotensin
The level of ______ is rate-limiting for the production of angiotensin II.
renin