more practice questions Flashcards
(34 cards)
the renal excretion rate for a solute is best described by what
filtration-reabsorption + secretion
what hormone is produced in response to renin release by the kidneys
angiotensin 2
which would increase both GFR and RBF
dilation of afferent arterioles
what can the kidney produce from alanine, glycerol and lactate
glucose
what hormone produced by the kidneys stimulates uptake of Ca from the intestines
1,25- (OH)2-cholecalciferol
normal plasma osmolarity of the ECF would be equal to what
300 mOsm/L
reabsorption by the kidney averages what quantity of tubular fluid/day
178.5 L/day
the average urine production in a day is equal to what
1.5 L/day
what effect does the efferent arterioles have on the glomerular capillary filtration pressure
keeps it constant along its length
in the kidney, where does all the filtration take place
glomerular capillaries
what nephrons are capable of concentrating the urine
juxtamedullary
urea transporters in the inner medullary collecting ducts are stimulated by what
ADH
what causes relaxation of the detrusor muscle and contraction of the internal sphincters, allowing the bladder to fill
stimulation of SNS
on average, what percent of body weight is due to extracellular fluid
20%
which contributes most to plasma osmolarity
plasma Na
if you experience a high water intake, what kind of fluid shift would you expect
shift from ECF to ICF, decrease in osmolarity
which marker is best suited to measure plasma volume using indicator dilution
radioactive albumen
what would cause a hyposmotic volume contraction associated with and increase in water loss>NaCl loss resulting in a decrease in ECF volume, increase in osmolarity, resulting in a shift in volume from ICF to ECF? There is no change in hematocrit
dehydration (sweating)
what substance would have the highest clearance
para aminohippuric acid
what best describes renal handling of albumen in the blood
not filtered and not secreted
what is the physiologic significance of substance x with a clearance ratio >1
substance x is both filtered and secreted
what is the physiologic significance of substance x with a clearance ratio >1
substance x is both filtered and secreted
why is the most important function of the kidney the reabsorption of Na
Na reabsorption drives virtually all other solute reabsorption
the majority of solute is reabsorbed in what portion of the nephron
proximal tubule
