Renal 3

What is not true of glomerular filtrate?

It lacks large proteins and cells
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

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

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


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

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

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


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?
Na/K pump maintains osmotic gradient
Glucose is pumped into the interstitial fluid
Water movement by osmosis
A brush border towards the tubal lumen

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?
Na+, K+ and Cl- active reabsorption
100 mOsmol/L leaving
Water reabsorption
Maintenance of medulla osmolality

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

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



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