Q. 13.7( 3 Votes )

Water reabsorptio A. Glomerulus

B. Renal tubules only

C. Efferent vessel

D. Renal tubule and collecting duct

Answer :

Glomerulus

Function


1. Development of Filtration pressure


It occurs because of 2 reasons


a. The diameter of efferent arteriole is smaller than that of afferent arteriole


b. Pressure of blood flow due to heart


2. Ultrafiltration


It occurs because of 2 reasons


a. Filtration pressure


Small sized pores


Renal Tubule


Renal Tubule comprises of


1. Proximal Convoluted tubule


-reabsorbs all glucose, amino acids, 2/3 Na and water


2. Loop of Henle


-ascending loop – impermeable to water, reabsorbs Na


-descending loop – impermeable to Na, reabsorbs water


3. Distal Convoluted tubule


-actively reabsorbs Na and Cl,


Impermeable to water, Reabsorption of water can only occur in presence of ADH/vasopressin hormone.


Efferent vessel


It carries the filtered blood out of the glomerulus


Collecting duct


Route of urine flow


Glomerulus (filtrate) Bowman’s Capsule Proximal Convoluted tubule Descending loop of henle ascending loop of henle Distal Convoluted tubule Collecting tubule collecting duct (urine) duct of belleni papillary duct minor calyx major calyx Ureter


Impermeable to water, Reabsorption can occur only in presence of ADH/vasopressin hormone

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