A&P Urinary System
1. Glomerular filtration rate 2. Net filtration pressure 3. Hydrostatic pressure in glomerular capillaries 4. Colloid osmotic pressure in glomerular capillaries 5. Hydrostatic pressure in the capsular space Glomerular blood pressure. Outward pressures minus the inward pressures. Pressure exerted by the proteins in the blood that sucks water into the capillary. Volume of filtrate formed each minute. The pressure exerted by filtrate in the glomerular capsule.
1. Volume of filtrate formed each minute. 2. Outward pressures minus the inward pressures. 3. Glomerular blood pressure. 4. Pressure exerted by the proteins in the blood that sucks water into the capillary. 5.The pressure exerted by filtrate in the glomerular capsule.
Calculate the net filtration pressure if blood pressure in the glomerulus is unusually high, around 68 millimeters of mercury (mm Hg). Assume the colloid osmotic pressure and capsular hydrostatic pressure are normal. 15 mm Hg 23 mm Hg 83 mm Hg 113 mm Hg
23 mm Hg
T/F Capsular hydrostatic pressure is the chief force pushing water and solutes out of the blood and across the filtration membrane.
False When the forces directed out of the capillary (glomerulus) exceed the forces directed into the capillary, net filtration pressure is positive, and filtration occurs. Glomerular hydrostatic (blood) pressure is the chief (outward directed) force pushing water and solutes out of the blood and across the filtration membrane.
Suppose that a patient has a failing liver and is unable to make normal levels of albumin for the blood plasma. If all other factors remain the same, what would be the effect on the amount of filtrate produced? Filtrate production would remain the same. Filtrate production would decrease. Filtrate production would increase.
Filtrate production would increase.
T/F Glomerular capillaries are drained by efferent arterioles whose diameter is smaller than the afferent arterioles that feed them; this creates the high blood pressure that drives filtration.
True The blood pressure in the glomerulus is extraordinarily high (approximately 55 mm Hg compared to an average of 26 mm Hg or so in other capillary beds) and it remains high across the entire capillary bed. This is because the glomerular capillaries are drained by a high resistance efferent arteriole whose diameter is smaller than the afferent arteriole that feeds them. As a result, filtration occurs along the entire length of each glomerular capillary and reabsorption does not occur as it would in other capillary beds.
Your patient's urinalysis shows a large amount of protein in the urine. This suggests a problem in the ____________ collecting ductperi tubular capillaries proximal convoluted tubule glomerulus
glomerulus
What is the chief force pushing water and solutes out of the blood and across the filtration membrane of the glomerulus? hydrostatic pressure in glomerular capillaries (HPgc) colloid osmotic pressure in glomerular capillaries (OPgc) hydrostatic pressure in the capsular space (HPcs) colloid osmotic pressure in the capsular space
hydrostatic pressure in glomerular capillaries (HPgc)
Which of the following is NOT a major urine formation process? tubular reabsorption micturition glomerular filtration tubular secretion
micturition
Which pressure accounts for the other three? capsular hydrostatic pressure net filtration pressure blood colloid osmotic pressure glomerular hydrostatic pressure
net filtration pressure
