14
MCQ (Single Correct Answer)
We can produce a concentrated/dilute urine. This is facilitated by a special mechanism. Identify the mechanism.
A
Reabsorption from PCT
B
Reabsorption from collecting duct
C
Reabsorption/Secretion in DCT
D
Counter current mechanism in Henle's loop/vasa recta
15
MCQ (Single Correct Answer)
Dialysing unit (artificial kidney) contains a fluid which is almost same as plasma except that it has
A
high glucose
B
high urea
C
no urea
D
high uric acid
16
Where does the selective reabsorption of glomerular filtrate take place?
Explanation
The selective reabsorption of glomerular filtrate takes place in Proximal Convoluted Tubules (PCT) and Distal Convoluted Tubules (DCT).
In PCT all essential elements nutrients, 70-80% of electrolytes and water is absorbed whereas, Distal Convoluted Tubule (DCT) is involved in conditional reabsorption of $\mathrm{Na}^{+}$and water.
17
What is the excretory product from kidneys of reptiles?
Explanation
Reptiles excrete nitrogenous wastes as uric acid in the form of pellet or paste with a minimum loss of water and are called uricotelic animals.
18
What is the composition of sweat produced by sweat glands?
Explanation
Sweat produced by sweat glands is a watery fluid containing NaCl , small amounts of urea, lactic acid, etc. Its primary function is to facilitate a cooling effect on the body surface and also to helps in removal of waste.