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CBSE - Class 11 Biology Excretory Products and Elimination Worksheet

1.
What is meant by the term osmoregulation?
2.
Indicate whether the following statements are true or false : (d) Henle’s loop plays an important role in concentrating the urine.
3.
Explain the autoregulatory mechanism of GFR.
4.
Fill in the gaps :
(a) Ascending limb of Henle’s loop is _______ to water whereas the descending limb is _______ to it.
5.
Give a brief account of the counter current mechanism.
6.
Indicate whether the following statements are true or false : (e) Glucose is actively reabsorbed in the proximal convoluted tubule.
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 : (a) Micturition is carried out by a reflex.
9.
Indicate whether the following statements are true or false : (b) ADH helps in water elimination, making the urine hypotonic.
10.
Fill in the gaps :
(c) Dialysis fluid contain all the constituents as in plasma except _______.
11.
Indicate whether the following statements are true or false : (c) Protein-free fluid is filtered from blood plasma into the Bowman’s capsule.
12.
Describe the role of liver, lungs and skin in excretion.
13.
Fill in the gaps :
(d) A healthy adult human excretes (on an average) _______ gm of urea/day.
14.
What is the significance of juxta glomerular apparatus (JGA) in kidney function?
15.
Name the following:
(a) A chordate animal having flame cells as excretory structures
16.
Name the following:
(b) Cortical portions projecting between the medullary pyramids in the human kidney
17.
Name the following:
(c) A loop of capillary running parallel to the Henle’s loop.
18.
Define Glomerular Filtration Rate (GFR)
19.
Explain micturition.
20.

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

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