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Q.

Find the option with the correct order of filtration membranes involved in ultrafiltration process.

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a

Endothelium of glomerular blood vessel, basement membrane, epithelium of Bowman’s capsule

b

Basement membrane, epithelium of Bowman’s capsule. endothelium of glomerular blood vessel

c

Basement membrane, endothelium of glomerular blood vessel, epithelium of bowman’s capsule

d

Epithelium of bowman’s capsule, endothelium of glomerular blood vessel, basement membrane

answer is A.

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Detailed Solution

The correct order of filtration membranes involved in the ultrafiltration process is as follows:

  • Endothelium of glomerular blood vessel: This is the innermost layer of the filtration membrane. It has specialised pores that allow smaller components like water, ions, and small solutes to pass through while preventing the passage of larger blood cells and proteins.
  • Basement membrane (Basal Lamina): The basement membrane lies between the endothelium and the epithelium of Bowman's capsule. It acts as a selective barrier, allowing filtration of small solutes while blocking larger molecules like proteins.
  • Epithelium of Bowman’s capsule: The epithelium of Bowman's capsule consists of specialised cells called podocytes. These cells have foot-like projections called pedicels that wrap around the capillaries of the glomerulus. The gaps between pedicels, known as filtration slits, allow the passage of the filtrate from the glomerulus into the Bowman's capsule.

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