Question

Which one of the following is correct regarding the excretion ?

(a) Large amount of water from renal filtrate is reabsorbed in DCT and a less amount is reabsorbed by PCT.

(b) The descending limb of loop of Henle is completely impermeable to salts.

(c) Malpighian corpuscle is found in medulla region of kidney.

(d) The colour of ***** is pale yellow and is slightly alkaline in nature.

Answer 1

The correct option is (b) The descending limb of loop of Henle is completely impermeable to salts.

Explanation:

In descending limb of loop of Henle, the water is reabsorbed from filtrate flowing in it due to increasing osmolarity of interstitial fluid. Sodium and other solutes are not reabsorbed here. The filtrate becomes hypertonic to blood plasma. All nephrons have their renal Malphigian corpuscles in the cortex. Corlical nephrons have their loop of Henle in the renal medulla near its junction with the renal cortex, while the loop of Henle of juxtamedullary nephrons is located deep in the renal medulla; they are called juxtamedullary because their renal corpuscle is located near the medulla (but still in the cortex).