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प्रश्न
Answer the following question.
Birds are uricotelic in nature. Give reason.
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उत्तर
- Birds are capable of converting ammonia into uric acid by ‘inosinic acid pathway’ in their liver.
- Uric acid is least toxic and hence, it can be retained in the body for some time.
- It is least soluble water hence, negligible amount of water is required for its elimination.
- This mode of excretion can also help reduce body weight (an adaptation for flight) and those animals which need to conserve more water follow uricotelism.
Hence, in order to conserve water as an adaptation for flight, birds are uricotelic in nature.
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संबंधित प्रश्न
Draw a diagram of the human excretory system and label the various parts.
The diagram given below shows the male urinogenital system of a human being. Study the diagram and answer the questions that follow:
(i) Label the parts numbered 1 to 8.
(ii) Name the corresponding structure of part (4) in female reproductive system.
(iii) What is the role of part 7?
Identify the odd one.
The diagram given alongside is that of a structure present in a human kidney:
Study the same and answer the questions that follow:
- Name the structure represented in the diagram.
- What is the liquid entering part ‘1’ called?
Name two substances present in this liquid that are reabsorbed in the tubule - What is the fluid that comes to part ‘2’ called? Name the main nitrogenous waste in it.
- Mention the three main steps involved in the formation of the fluid mentioned in (c) above.
- Name the substance which may be present in the fluid in part ‘2’ if a person suffers from Diabetes mellitus
Name an animal which absorbs oxygen through its moist skin.
What gaseous waste products are excreted by plants?
Give a technical term:
The duct which transports urine from the kidney to the urinary bladder.
Write the functional activity of the following structure: Henle’s loop
Choose the correct option.
Which one of the following organisms would spend maximum energy in the production of nitrogenous waste?
The habitat of animals that excrete nitrogenous waste in the form of urea.
