Renal 3

What is not true of glomerular filtrate?

it is produced at a rate of 125ml per minute (approximately)
It has the same osmotic pressure as plasma
It lacks large proteins and cells
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
Increased glomerular surface area
Increased blood pressure
afferent arteriole vasoconstriction
efferent arteriole constriction


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

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

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


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

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

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


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

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

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



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