Multiple Choice
The hydrostatic pressure in glomerular capillaries is the chief force pushing water and solutes out of the blood and across the filtration membrane.
25. The Urinary System
Renal Physiology Step 1: Glomerular Filtration
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The ________________ is the finest layer of the filtration membrane.
A
Fenestrated endothelium of the glomerular capillaries.
B
Basal lamina.
C
Filtration slits of the podocytes.
Verified step by step guidance1
Understand the structure of the filtration membrane in the kidneys, which is crucial for the process of filtering blood to form urine.
Identify the components of the filtration membrane: the fenestrated endothelium of the glomerular capillaries, the basal lamina, and the filtration slits formed by podocytes.
Recognize that the fenestrated endothelium is the first layer that blood encounters, allowing the passage of water and small solutes while blocking larger molecules.
Learn that the basal lamina acts as a selective barrier, further filtering substances based on size and charge.
Note that the filtration slits of the podocytes are the finest layer, providing the final level of filtration by allowing only the smallest molecules to pass through into the Bowman's capsule.
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