Renal 3

What is not true of glomerular filtrate?

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)
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
Having both afferent and efferent arterioles
Smooth muscle cells within the capillaries
the leaky nature of the glomerular endothelium

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


What does not contribute to net filtration pressure
Capsular hydrostatic pressure
Glomerular endothelial pressure
Glomerular hydrostatic pressure
Blood colloid osmotic 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?
Angiotensin II
Atrial Natriuretic Peptide
Anything affecting blood pressure
Amount of energy available for active transport


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

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

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


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

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

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



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