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CBSE - Class 11 Biology Excretory Products and Elimination Worksheet

1.
Indicate whether the following statements are true or false : (e) Glucose is actively reabsorbed in the proximal convoluted tubule.
2.
Give a brief account of the counter current mechanism.
3.
Fill in the gaps :
(c) Dialysis fluid contain all the constituents as in plasma except _______.
4.
Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why ?
5.
Indicate whether the following statements are true or false : (d) Henle’s loop plays an important role in concentrating the urine.
6.
What is meant by the term osmoregulation?
7.
Fill in the gaps :
(b) Reabsorption of water from distal parts of the tubules is facilitated by hormone _______.
8.
Indicate whether the following statements are true or false : (c) Protein-free fluid is filtered from blood plasma into the Bowman’s capsule.
9.
Name the following:
(a) A chordate animal having flame cells as excretory structures
10.
Name the following:
(b) Cortical portions projecting between the medullary pyramids in the human kidney
11.
What is the significance of juxta glomerular apparatus (JGA) in kidney function?
12.

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

      Column I                             Column II

(a) Ammonotelism               (i) Birds

(b) Bowman’s capsule          (ii) Water reabsorption

(c) Micturition                     (iii) Bony fish

(d) Uricotelism                    (iv) Urinary bladder

(e) ADH                             (v) Renal tubule

13.
Describe the role of liver, lungs and skin in excretion.
14.
Explain micturition.
15.
Indicate whether the following statements are true or false : (b) ADH helps in water elimination, making the urine hypotonic.
16.
Fill in the gaps :
(d) A healthy adult human excretes (on an average) _______ gm of urea/day.
17.
Indicate whether the following statements are true or false : (a) Micturition is carried out by a reflex.
18.
Name the following:
(c) A loop of capillary running parallel to the Henle’s loop.
19.
Fill in the gaps :
(a) Ascending limb of Henle’s loop is _______ to water whereas the descending limb is _______ to it.
20.
Define Glomerular Filtration Rate (GFR)

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