Renal 3

What is not true of glomerular filtrate?

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

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
efferent arteriole constriction
Increased glomerular surface area
Increased blood pressure
afferent arteriole vasoconstriction


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

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

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


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

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


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

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

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



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