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Passive Transport

Which of the ...

Question

Which of the following statements is incorrect about the PCT of a nephron?

A

It is lined by simple cuboidal brush bordered epithelium

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B

PCT helps to maintain the pH and ionic balance of the body fluids

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C

70-80% of electrolytes and water are reabsorbed in the peritubular capillaries around this segment

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D

Selective absorption of hydrogen ions, ammonia and creatinine occurs in this segment

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Solution

The correct option is D Selective absorption of hydrogen ions, ammonia and creatinine occurs in this segment
Selective secretion of hydrogen ions, ammonia and creatinine occurs in this segment.

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Similar questions

Q. Which of the following statements are correct?

(i) Re-absorption of water occurs passively in the initial segment of nephron.
(ii) Nitrogenous wastes are absorbed by passive transport.
(iii) Conditional re-absorption of

N a^{+}

and water takes place in DCT.
(iv) DCT reabsorbs

H C O_{3}

(v) DCT is capable of selective secretion of

H^{+}

K^{+}

N H_{3}

p H

N a^{+} - K^{+}

balance in blood.

Q. Read the following statements and choose the correct option
I. Ascending limb of Henles loop is permeable to water
II. Tubular cells secrete substance like

H^{+}, K^{+}

and ammonia into filtrate
III. There is maximum reabsorption in Henles loop
IV. Conditional reabsorption of

N a^{+}

occurs in DCT.
V. PCT helps in maintaining ionic balance of body fluids.

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. Which of the following statements is/are incorrect?
(i) Absorption of simple sugar, alcohol, some water and medicines takes place in stomach.
(ii) Maximum water absorption occurs in large intestine.
(iii) Small intestine is the major site of digestion and absorption of food.
(iv) Fatty acid and glycerol are absorbed by lacteals.
(v) Nothing is absorbed in mouth and large intestine.

Q. Which segment does not play a role in the maintenance of pH and ionic balance of blood by selective secretion?

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