Given below are two statements : Statement I : In cortical nephrons, the loop of Henle is very long and runs deep into the medulla. Statement II : The ascending limb of the loop of Henle is impermeable to water but allows transport of electrolytes actively or passively. In the light of the above statements, choose the correct answer from the options given below :

Step-by-step solution

Statement I is false because in cortical nephrons, the loop of Henle is short and extends only very little into the medulla. It is the juxtamedullary nephrons that have a very long loop of Henle running deep into the medulla. Statement II is true because the ascending limb of the loop of Henle is impermeable to water but allows the transport of electrolytes actively or passively. This helps in the maintenance of high osmolarity of medullary interstitial fluid. Answer: Statement I is false but Statement II is true