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Class 11 Excretory Products and their Elimination worksheet
CBSE Biology. Nitrogenous wastes, nephron, urine formation, GFR, regulation, disorders. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
Animals that excrete mainly ammonia are called:
- uricotelic
- guanotelic
- ureotelic
- ammonotelic
Answer
(d) ammonotelic
most bony fishes, aquatic amphibians and aquatic insects
- 2.
The kidneys filter 114 mL of plasma a minute. How much filtrate is formed in a day?
- 164.16 L
- 6.84 L
- 1,641.6 L
- 2.74 L
Answer
(a) 164.16 L
114 × 1,440 minutes
- 3.
If 190 L of filtrate is formed in a day and 1.8 L of urine is passed, the percentage of filtrate reabsorbed is:
- 94.05%
- 90%
- 99.05%
- 0.95%
Answer
(c) 99.05%
(190 − 1.8) ÷ 190 × 100
Section B · short answer
- 4.
What is the difference between ammonotelism, ureotelism and uricotelism?
Answer
Ammonotelic animals excrete ammonia, which is very toxic and needs a lot of water (bony fishes). Ureotelic animals excrete urea, less toxic (mammals, land amphibians). Uricotelic animals excrete uric acid as a paste or pellet with very little water (birds, reptiles, land snails, insects).
- 5.
The GFR of a person is 130 mL per minute, and they pass 2 L of urine a day. Find the filtrate formed in a day and the percentage reabsorbed.
Answer
187.2 L; 98.93%
130 × 1,440 mL; (187.2 − 2) ÷ 187.2 × 100
Section C · long answer
- 6.
Describe the structure of the human kidney and the nephron.
Answer
The kidneys are reddish-brown, bean-shaped organs on either side of the backbone; each has an outer cortex and inner medulla with medullary pyramids projecting into calyces, and about a million nephrons. Each nephron has a glomerulus (a tuft of capillaries from the afferent arteriole, leaving by the efferent arteriole) enclosed in Bowman’s capsule, followed by the PCT, the hairpin-shaped loop of Henle, and the DCT, which drains into a collecting duct.
Fresh sheets for your child
In the app, every Excretory Products and their Elimination sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
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