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What are the forces opposing filtration at the glomerulus?
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25. The Urinary System
Renal Physiology: Regulation of Glomerular Filtration
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Which of the following forces opposes glomerular filtration?
A
Glomerular capillary hydrostatic pressure
B
Plasma colloid osmotic pressure
C
Afferent arteriolar resistance
D
Bowman's capsule hydrostatic pressure
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Understand that glomerular filtration is the process by which the kidneys filter blood, removing excess wastes and fluids.
Identify the forces involved in glomerular filtration: glomerular capillary hydrostatic pressure, plasma colloid osmotic pressure, and Bowman's capsule hydrostatic pressure.
Recognize that glomerular capillary hydrostatic pressure is the force that drives filtration by pushing fluid out of the capillaries into Bowman's capsule.
Understand that plasma colloid osmotic pressure opposes filtration by pulling water back into the capillaries due to the presence of proteins in the blood.
Identify Bowman's capsule hydrostatic pressure as the force that opposes filtration by exerting pressure against the fluid entering the capsule, thus resisting the movement of fluid from the capillaries.
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