Question

Following are four statements. Find out the correct combination.
1. Glucose has high threshold value.
2. Urine is concentrated in Henles loop.
3. Haemodialyser removes urea, uric acid, glucose and proteins.
4. In glomerulus, urea, uric acid, water, glucose and plasma proteins are filtered out

• A. $1,3,4$
• B. $2,3,4$
• C. $1,2$
• D. $1,3$

Answer 1

Answer: (C)

$1,2$

1) The substances which are present in blood on being filtered into the tubule are completely reabsorbed are called as high threshold substance. For example, Glucose, NaCl.Hence Glucose has a high threshold value.

2) Urine in concentrated in heles loop through a countercurrent mechanism. The flow of filtrate in the two limbs of Henle’s loop is in opposite directions and thus forms a counter current. The flow of blood through the two limbs of vasa recta is also in a countercurrent pattern. The proximity between the Henle’s loop and vasa recta, as well as the countercurrent in them, help in maintaining the concentration of urine.

So, the correct answer is '1,2'.