A) the basement membrane of the epithelial cells of Bowman's capsule
B) the cell surface membrane of the endothelial cells of the capillaries
C) the cell surface membrane of the epithelial cells of Bowman's capsule
D) the spaces between the extensions of the podocytes of Bowman's capsule
Correct Answer: A
Solution :
[a] Filtration occurs through 3 layers: the en- dothelium of blood capillaries, the basement membrane of the epithelium and the filtra tion slits of the renal capsule. The endothe lium of blood capillaries contains large pores which do not filter out larger molecules, The basement membrane consists of a meshwork of collagen fibres that are able to filter them out. The filtration silts are formed by the podocytes and do not hinder the passage of large molecules.
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