Question

Mechanism of urine formation

Answer 1

Basic function of nephrons is to clear out the blood plasma from unwanted substances. Urea , creatininie, uric acids, hippuric acids and drug remains etc cleaned by nephrons. The fluid comings out from the nephrons, containing these unwanted substances is called urine .

Answer 2

$\large\tt\underline\red{Mechanism\:of\:Urine\:Formation:-}$

The Urine formation involves three steps:-

$\small\star\tt\underline\purple{Glomerular\:Filteration-}$

Blood is filtered from the glomerulus into Bowman's capsule of the nephron. This filterate passes through the tubules of the nephron.

$\small\star\tt\underline\green{Tubular\:re-absorption-}$

Now, useful substances from the filterate like $\small\sf{{Na}^{+}}$ , $\small\sf{{K}^{+}}$ ,glucose, Amino acid, etc. are reabsorbed by the capillaries surrounding the nephron into the blood.

$\small\star\tt\underline\orange{Secretion-}$

Urea, extrawater and salts are excreted into the tubule which open up into the collecting duct & then the ureter.