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Tubular Reabsorption and Secretion

Choose the wr...

Question

Choose the wrong statement regarding urine formation.

A

Filtration is non-selective process performed by glomerulus.

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B

Glomerular capillary blood pressure causes filtration of blood through three layers.

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C

GFR in a healthy individual is approximately 125 ml/min.

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D

A fall in GFR activates juxtaglomerular apparatus cells to release renin.

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E

Ascending limb of Henle's loop is permeable to water but allows transport of electrolytes actively or passively.

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Solution

The correct option is E Ascending limb of Henle's loop is permeable to water but allows transport of electrolytes actively or passively.
The nephron is the structural and functional unit of the kidney. Its body is divided into Renal corpuscle, Proximal convoluted tubule(PCT), Henle's loop and distal convoluted tubule (PCT). Henle's loop has an ascending limb and descending limb. The ascending limb of Henle's is impermeable to water but allows transport of electrolytes actively or passively.
So, the correct answer is 'Option D'.

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Similar questions

Q. Consider the following statements each with one or two blanks.
(i) The ascending limb of loop of Henle is impermeable to (1) but allows transport of (2)
(ii) (3) and (4) play a significant role in producing a concentrated urine.
(iii) A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release (5)
Which one of the following options correctly fills the blanks in any two of the statements?

Q. Choose the incorrect statement from the following statements
I) GFR in a healthy individual is approximately 125 ml/hr.
II) During urine formation, the tubular cells secrete substances like

H^{+}

K^{+}

and ammonia into the filtrate.
III) On an average, 1100-1200 ml of blood is filtered by the kidneys per minute.
IV) Substances like glucose, amino acids,

N a^{+}

in the filtrate are reabsorbed by passive transport.

Q. A fall in glomerular filtration rate (GFR) activates

Q. Read the following statements and choose the correct option
i. Glomerular filtration rate in a healthy individual is about 180 ml/day
ii. All constituents of plasma pass into the lumen of Bowmans capsule
iii. 70 - 80% of electrolytes and water are reabsorbed in PCT
iv. Angiotensin II increases the glomerular blood pressure and GFR
v. Countercurrent systems contribute to concentrating the filtrate

Q. Select the statements which are correct with respect to loop of Henle in a nephron.
1) Ascending limb of loop of Henle is impermeable to electrolytes, but is permeable to water.
2) Descending limb of loop of Henle is permeable to water but is impermeable to electrolytes
3) Both ascending and descending limbs are permeable to water.
4) Reabsorption is minimum in the ascending limb of loop of Henle.

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