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8 Cards in this Set
- Front
- Back
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Constriction of the glomerular capillaries has what affect?
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Reduces RBF
Reduces glomerular hydrostatic pressure Decreases GFR |
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Glomerular Hydrostatic Pressure is...
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60
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Glomerular Colloid Osmotic Pressure...
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32
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Bowman’s capsule pressure is the only source of pressure to pull fluid into...
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The proximal tubule→ the Loop of Henle→ the distal tubule→ the collecting duct
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Filtration is determined by....
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The fact that when blood enters there is resistance of the afferent arteriole but going out there is another resistance of the efferent arteriole and so because of the tight squeezing section after the glomerular capillaries, this mechanism keeps the glomerular capillary hydrostatic pressure much higher than in systemic circulation
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Describe colloid osmotic pressure...
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Colloid osmotic is coming in from the afferent arteriole is like systemic system at about 25 mmHg but because the body is so densely concentrating the plasma proteins by the time the fluid leaves the glomerular capillary it has achieved an oncotic pressure of 40 mmHg or more
Colloid osmotic pressure in the system barely budges but the because of the length of the capillary, H20 is lost, so the oncotic pressure keeps going up |
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So capillary hydrostatic pressure has to be high enough to overcome the Bowman’s capsule pressure because..
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This keeps enough fluid flowing in to fill the Bowman’s space
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Starling forces within the renal vasculature favor filtration at the [.......] and reabsorption at the [.......]
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Glomerulus
Peritubular capillaries |
