EasyZoologyReabsorption
+4 / -1
Assertion (A): Glucose, amino acids, Na+ etc. in the filtrate are reabsorbed actively.
Reason (R): The nitrogenous wastes are absorbed by passive transport.
A
Both (A) and (R) are true and (R) is the correct explanation of (A)
B
Both (A) and (R) are true but (R) is not the correct explanation of (A)
C
(A) is true statement but (R) is false.
D
Both (A) and (R) are false.
Explanation
SELECTIVE TUBULAR REABSORPTION A comparison of the volume of the filtrate formed per day (180 litres per day) with that of the urine released (1.5 litres), suggest that nearly 99% of the filtrate has to be reabsorbed by the renal tubules. This process is called reabsorption. The tubular epithelial cells in different segments of nephron perform this reabsorption either by both active and passive mechanisms. For example substances like glucose, amino acid, Na + etc. in the filtrate reabsorbed actively whereas the nitrogenous wastes are absorbed by passive transport. Both (A) and (R) are true but (R) is not the correct explanation of (A) 11th - NCERT, Page No. - 294
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