This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidneys and Body Fluids, Subject name: Physiology
Which of the following does not form filtration barrier in nephrons: 
Select and explain. 
A. Podocytes, B. Endothelial cells, C. Mesangium, D. Basement membrane (basal lamina)
C: Mesangium
Answer: C: Mesangium 
Explanation: Ans. C. Mesangiuma. Two cellular layers separate the blood from glomerular filtrate in Bowman's capsule, Capillaryb. endothelium and specialized endothelium.c. These two layers are separated by aBASAL LAMINA.d. Stellate cells called mesangial cells send their processes between endothelium and basal lamina.e. Cells of epithelium are called podocytes and they send numerous pseudopodia which interdigitate andf. form slits along the capillary walls podocytes