Renal 3

What is not true of glomerular filtrate?

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

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

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


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

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

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


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

Which is not a feature of the proximal convoluted tubule?
Water movement by osmosis
A brush border towards the tubal lumen
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 urea permeability
300 mOsmol/L average filtrate concentration
high NaCl permeability


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

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

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



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