RENAL FUNCTION AND RENAL FUNCTION TEST Flashcards
it supplies blood to the kidney
renal artery
how much blood flow do kidneys receive?
25%
based on average body size of
1.73m^2
total renal blood flow
1200mL/min
total renal plasma flow
600 to 700mL/min
functions of kidney
- Maintaining homeostasis
- Excretion of waste products
- Concerned with the maintenance
of blood pressure and
erythropoiesis
it consists of eight capillary lobes referred to as capillary ducts
glomerulus
molecular weight of glomerulus
<70,000
where is the glomerulus located?
bowman’s capsule
what are the pores in capillary wall membrane called?
fenestrated
pores that increase capillary permeability but do not allow the passage of large
molecules and blood cells.
fenestrated
restriction of large molecules occurs as the filtrate passes
Basement membrane (basal lamina)
the thin membranes covering the filtration slits formed by
the intertwining foot processes of the podocytes of the
inner layer of Bowman’s capsule
Visceral epithelium of Bowman’s capsule.
necessary to overcome the opposition of pressure from the fluid from the Bowman’s
capsule and the ONCOTIC PRESSURE of unfiltered plasma protein.
HYDROSTATIC PRESSURE
this mechanism maintains the glomerular blood pressure at a relatively constant rate
Autoregulatory mechanism
Dilation of the afferent arterioles and constriction of the
efferent arterioles
BP drops