Biology - Excretory Products and their Elimination Question with Solution | TestHub

Primary urine, also known as glomerular filtrate, is formed in the Bowman's capsule located in the renal cortex.

The glomerular filtrate is isotonic to the blood plasma.

The osmolarity of blood plasma is approximately $300$ mOsmol ${\text{L}}^{-1}$.

Therefore, the osmolarity of the primary urine in the cortex of the kidney is $300$ mOsmol ${\text{L}}^{-1}$.

Answer: $300$ m Osmol ${\text{L}}^{-1}$