The following substances are the excretory products in animals. Choose the least toxic form among them.

1. Urea

2. Uric acid

3. Ammonia

4. Carbon dioxide

Subtopic:  Nitrogenous Excretory Products |
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Filtration of the blood takes place at

1. PCT

2. DCT

3. Collecting ducts

4. Malpighian body

Subtopic:  Formation of Urine | Formation of Urine: Ultrafiltration |
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Which of the following statement is correct?

 
1. ADH prevents the conversion of angiotensinogen in blood to angiotensin.
2. Aldosterone facilitates water reabsorption.
3. ANF enhances sodium reabsorption.
4. Renin causes vasodilation.
Subtopic:  Osmoregulation |
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A large quantity of one of the following is removed from our body by lungs.

1. CO2 only

2. H2O only

3. CO2 and H2O

4. ammonia

Subtopic:  Role of other Organs in Excretion |
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The pH of human urine is approximately

1. 6.5

2. 7

3. 6

4. 7.5

Subtopic:  Formation of Urine |
 61%
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Different types of excretory structures and animals are given below. Match them appropriately and mark the correct answer from among those given below

Excretory Structure/Organ Animals
A. Protonephridia 1. Prawn
B. Nephridia 2. Cockroach 
C. Malpighain tubules 3. Earthworm
D. Green gland or antennal gland  4. Flatworms 

Codes
 

A B C D
1. 4 3 2 1
2. 2 3 1 2
3. 4 3 1 2
4. 2 3 2 4

 

Subtopic:  Nitrogenous Excretory Products |
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Which one of the following statements is incorrect?

1. Birds and land snails are uricotelic animals
2. Mammals and frogs are ureotelic animals
3. Aquatic amphibians and aquatic insects are ammonotelic animals
4. Birds and reptiles are ureotelic

Subtopic:  Nitrogenous Excretory Products |
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Which of the following pairs is wrong?

1. Uricotelic ......... Birds

2. Ureotelic ......... Insects

3. Ammonotelic ......... Tadpole

4. Ureotelic .......... Elephant

Subtopic:  Nitrogenous Excretory Products |
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Which one of the following statement is incorrect?
 

1. The medullary zone of kidney is divided into a few conical masses called medullary pyramids projecting into the calyces.
2. Inside the kidney the cortical region extends in between the medullary pyramids as renal pelvis.
3. Glomerulus along with Bowman’s capsule is called the renal corpuscle.
4. Renal corpuscle, Proximal Convoluted Tubule (PCT) and Distal Convoluted Tubule (DCT) of the nephron are situated in the cortical region of kidney.

Subtopic:  Human Kidney: Location & Cut Section |
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The condition of accumulation of urea in the blood is termed as

1. renal calculi

2. glomerulonephritis

3. uremia

4. ketonuria

Subtopic:  Disorders of Excretory System |
 91%
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