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NCERT solutions Biology Textbook for Class 11 chapter 19 Excretory Products and their Elimination

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Chapter 19 - Excretory Products and their Elimination

Pages 289 - 301

Define Glomerular Filtration Rate (GFR)

Q 1 | Page 300 | view solution

Explain the autoregulatory mechanism of GFR.

Q 2 | Page 300 | view solution

Indicate whether the following statements are true or false:

Henle’s loop plays an important role in concentrating the urine.

Q 3.4 | Page 300 | view solution

Indicate whether the following statements are true or false:

Glucose is actively reabsorbed in the proximal convoluted tubule.

Q 3.5 | Page 300 | view solution

Give a brief account of the counter current mechanism.

Q 4 | Page 300 | view solution

Describe the role of liver, lungs and skin in excretion.

Q 5 | Page 300 | view solution

Explain micturition.

Q 6 | Page 300 | view solution

Match the items of column I with those of column II:

  Column I   Column II
a Ammonotelism 1 Birds
b Bowman’s capsule 2 Water reabsorption
c Micturition 3 Bony fish
d Uricotelism 4 Urinary bladder
e ADH 5 Renal tubule
Q 7 | Page 300 | view solution

What is meant by the term osmoregulation?

Q 8 | Page 289 | view solution

Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why?

Q 9 | Page 301 | view solution

What is the significance of juxtaglomerular apparatus (JGA) in kidney function?

Q 10 | Page 301 | view solution

Name the following: A chordate animal having flame cells as excretory structures

Q 11.1 | Page 301 | view solution

Name the following: Cortical portions projecting between the medullary pyramids in the human kidney

 

Q 11.2 | Page 301 | view solution

Name the following: A loop of capillary running parallel to the Henle’s loop

Q 11.3 | Page 301 | view solution

Fill in the gaps:  Ascending limb of Henle’s loop is ____________to water whereas the descending limb is___________to it.

Q 12.1 | Page 301 | view solution

Fill in the gaps:

Reabsorption of water from distal parts of the tubules is facilitated by hormone____________.

Q 12.2 | Page 301 | view solution

Fill in the gaps:

Dialysis fluid contains all the constituents as in plasma except   ________.

Q 12.3 | Page 301 | view solution

Fill in the gaps:

A healthy adult human excretes (on an average) _______ gm of urea/day.

Q 12.4 | Page 289 | view solution

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