Renal 3

What is not true of glomerular filtrate?

It lacks large proteins and cells
It is conceptually the same as tea
It has the same osmotic pressure as plasma
it is produced at a rate of 125ml per minute (approximately)

Which factor does not contribute to the ability of the glomerulus to filter blood
Having both afferent and efferent arterioles
the leaky nature of the glomerular endothelium
Ability of filtrate to leave the capsule
Smooth muscle cells within the capillaries

What does not increase glomerular filtration rate
afferent arteriole vasoconstriction
efferent arteriole constriction
Increased blood pressure
Increased glomerular surface area


What does not contribute to net filtration pressure
Blood colloid osmotic pressure
Glomerular hydrostatic pressure
Glomerular endothelial pressure
Capsular hydrostatic pressure

Which component of net filtration pressure is most moderated the body?
Blood colloid osmotic pressure
Glomerular hydrostatic pressure
Capsular hydrostatic pressure
Net filtration pressure

Which is not a regulatory feature of glomerular filtration?
Amount of energy available for active transport
Anything affecting blood pressure
Atrial Natriuretic Peptide
Angiotensin II


Which is not a re-absorbed by the proximal convoluted tubule?
~ 60% glomerular filtrate
~60% NaCl
~ 100% proteins
~100% glucose

Which is not a feature of the proximal convoluted tubule?
A brush border towards the tubal lumen
Water movement by osmosis
Glucose is pumped into the interstitial fluid
Na/K pump maintains osmotic gradient

What is not a disorder of the descending loop of Henle?
high water permeability
high NaCl permeability
high urea permeability
300 mOsmol/L average filtrate concentration


Which is not a function of the thick ascending loop of Henle?
100 mOsmol/L leaving
Maintenance of medulla osmolality
Water reabsorption
Na+, K+ and Cl- active reabsorption

The loops are an example of an ___ mechanism
Negative feedback
Proximal
Spontaneous depolarising
Counter current

Which is not characteristic of the collecting duct?
It solely determines the final concentration of urine
It allows for movement of water by osmosis
It contains aquaporin II in vesicles when ADH is low
It is entirely impermeable to urea



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