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Function of the Collecting Duct

Parts A, B,...

Question

Parts $A, B, C$ and $D$ of Nephron are shown in the diagram select the option which is incorrect with its function.

A

A - 70 - 80

% water reabsorbed

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B

B -

Permeable to salts

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C

C -

Selective secretion of

H^{+}

and

K^{+}

ions and maintain

p H

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D

D

-allows passage of small amount of urea into the medullary interstitium and help to produce concentrated urine

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Solution

The correct option is B $B -$ Permeable to salts
The loop of Henle plays a significant role in maintaining high osmolarity of medullary interstitial fluid. The descending limb of loop of Henle being permeable to water and impermeable to electrolytes, concentrates the filtrate.
So the correct answer is 'B - permeable to salts'.

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Similar questions

Q. 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

p H

and ionic balance of blood by the selective secretion of

H^{+}

K^{+}

Q. Refer to the diagram of a nephron and answer the questions. [5 MARKS]

(a) Where does ultrafiltration occur?
(i) 1 (ii) 3 (iii) 2 (iv) 5

(b) Where is most of the water reabsorbed into the blood stream?
(i) 4 (ii) 5 (iii) 3 (iv) 7

(c) Where is most of the glucose reabsorbed?
(i) 4 (ii) 5 (iii) 6 (iv) 7

(d) Which structure helps to concentrate urine and is very long in desert mammals such as the kangaroo rat?
(i) 1 (ii) 2 (iii) 5 (iv) 6

(e) Which structure contains urine?
(i) 4 (ii) 5 (iii) 6 (iv) 7

Q. Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/ characteristics.

Q. Parts A,B,C and D of the areolar connective tissue are shown in the diagram. Selection the option which gives correct identification along with its functions/ characteristics

Q. The increase in osmolarity from outer to inner medullary interstitium is maintained due to:

(i) Close proximity between Henle's loop and vasa recta
(ii) Counter current mechanism
(iii) Selective secretion of

H C O_{3}^{-}

and hydrogen ions in

P C T

(iv) Higher blood pressure in glomerular capillaries

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