Renal 3

What is not true of glomerular filtrate?

It is conceptually the same as tea
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

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

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


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?
Net filtration pressure
Capsular hydrostatic pressure
Glomerular hydrostatic pressure
Blood colloid osmotic 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?
~100% glucose
~ 100% proteins
~ 60% glomerular filtrate
~60% NaCl

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

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


Which is not a function of the thick ascending loop of Henle?
Maintenance of medulla osmolality
100 mOsmol/L leaving
Na+, K+ and Cl- active reabsorption
Water 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 allows for movement of water by osmosis
It is entirely impermeable to urea
It contains aquaporin II in vesicles when ADH is low
It solely determines the final concentration of urine



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