Collecting Duct

Which of the following statements is false regarding the collecting duct? I. Collecting duct is a straight duct II. It extends from the cortex to medulla III. Large amount of water could be reabsorbed from it to produce concentrated urine IV. Small amount of urea diffuses out from it into the medulla to keep up the osmolarity V. It plays a role to maintain pH and ionic balance of blood by the selective secretion of H^(+)andK^(+) ions

Match the following :- {:(,"Column-I",,"Column-II"),(A,"PCT",(i),"Selective secretion of " H^(o+) " and " K^(o+) "ions"),(B,"DCT",(ii),"70-80 percent of electrolytes and water reabsorbed " ),(C,"Descending",(iii),"Allow passage of limb small amount of urea."),(D,"Ascending",(iv),"Permeable to water"),(E,"Collecting duct",(v),"Permeable to salts"):}

In the following questions , a statement of assertion (A) is followed by a statement of reason (R). A: ADH response is observed during increased osmolarity due to dehydration. R : Vasopressin promotes water uptake from collecting ducts and DCT.

Statement-1: The final reabsorption of water from the urine into the blood occurs through the collecting duct of a mammalian nephron resulting in thhe production of hyperosmotic urine. Statement-2: The loop of henle creates a sodium gradient in the interstitial fluid.

A: The final reabsorption of water from urine into blood ocurs through the collecting duct of a mammalian nephron, resulting in the production of hyperosomotic urine. R: The loop of Henle is responsible for the formation of a sodium gradient across the depth of the medullary intersitium of a mammalian kidney.

Which of the following statements is/are incorrect regarding the collecting duct? (i). It extends from the cortex to medulla. (ii). Large amount of water could be reabsorbed by it to produce concentrated urine. (iii). Small amount of urea diffuses into it from the medulla to keep up the osmolarity. (iv). it plays a role in maintaining pH and ionic balance of blood by the selective secretion of H^(+) and K^(+) ions.

Pick the odd ones in each of the following groups and select the correct option (i). Renal pelvis, Medullary pyramid, Renal cortex, Renal papilla (ii). Afferent arteriole, Henle's loop, Vasa recta, Efferent arteriole (iii). Glorerular filtration, antidiuretic hormone, Hypertonic urine, collecting duct (iv). Proximal convoluted tubule, distal convoluted tubule, Henle's loop, Renal corpuscle

Collecting tubes or ducts combine to form