Excretion and Excretory Products
Excretion and Excretory Products: Overview
This topic covers concepts such as contractile vacuoles, euryhaline organisms, excretory products and their elimination, nitrogenous waste materials and ammonotelism.
Important Questions on Excretion and Excretory Products
The principal nitrogenous excretory compound in humans is synthesized
Uric acid is the chief nitrogenous component of the excretory products of
Earthworms are
In ornithine cycle, which of the following wastes are removed from the blood?
Uricotelism is found in
The enteronephric nephridia of earthworm are concerned with
In ureotelic animals, urea is formed by the
In ureotelic animals, which one pair of the following wastes are removed from the blood?
Uric acid is nitrogenous waste in
Aquatic reptiles are:
Which of the following are uricotelic animals?
Match List I and List II
| List I | List II | ||
| A | Taenia | I | Nephridia |
| B | Paramoecium | II | Contractile vacuole |
| C | Periplaneta | III | Flame cells |
| D | Pheretima | IV | Uricose gland |
Choose the correct answer from the options given below:
The cells of cockroach eliminate the nitrogenous waste by discharging it in the haemolymph. This nitrogenous waste is eliminated out primarily in the form of:
Human urine smell of ammonia if allowed to stand for sometime because:
Match the following :
| Excretory organs | Examples | ||
| A) | Protonephridium | I) | Terrestrial arthropods |
| B) | Malpighian tubules | II) | Crustaceans |
| C) | Pericardial glands | III) | Amphibians |
| D) | Antennary glands | IV) | Rotifers |
| V) | Adult molluscs |
The correct match is
Maximum energy is requires for elimination of:
Ammonia produced by metabolism is converted into in the liver of mammals and released into which is filtered and out by kidney.
| Substance | Glomerular Filtrate |
Reabsorbed | Urine |
| Proteins | |||
| Glucose | |||
| Urea | |||
| Creatinine |
(1) Glucose is completely reabsorbed
(2) Urea is partially reabsorbed
(3) Proteins are secreted into urine
(4) Creatinine is secreted into urine
Which of the following options, in view of above statements is correct?
Which one of the following option gives the correct categorization of six animals according to the type of nitrogenous wastes {A (Ammonotelic), B (Ureotelic), C (Uricotelic)} they give out?
Nitrogenous waste is eliminated through
