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प्रश्न
The excretory organs in an earthworm are:
(a) nephridia
(b) nephrons
(c) raphides
(d) ureters
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उत्तर
(a) nephridia
In earthworm, the main excretory organs are nephridia. It functions like a kidney.
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संबंधित प्रश्न
The Biological/technical term for The removal of nitrogenous wastes from the body
Name the basic filtration unit present in the kidney.
Blood in the renal artery or renal vein (Which one has more urea ?)
The diagram given below is that of a structure present in a human kidney.
Study the same and answer the questions that follow:
1) Name the structure represented in the diagram
2) What is the liquid entering part ‘1’ called?
Name two substances present in this liquid that are reabsorbed in the tubule.
3) What is the fluid that comes to part ‘2’ called?
Name the main nitrogenous waste in it.
4) Mention the three main steps involved in the formation of the fluid mentioned in (iii) above
5) Name the substance which may be present in the fluid in part ‘2’ if a person suffers from Diabetes mellitus.
Where is the dirty blood in our body filtered?
Name a waste gas released by the plants only during the night time.
State whether the following statement is true or false:
Some organisms store wastes in body parts.
Where is urine carried through ureters?
What is urethra?
The excretory unit in the human excretory system is called:
The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person's blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation.
(a) What are organs A?
(b) Name the waste substance B.
(c) What are (i) E, and (ii) F?
(d) Name G, H and I.
(e) What is the process described above known as?
Answer the following in short.
List five waste products of plants.
Choose the odd one out in the following series:
Proximal convoluted duct, loop of Henle, vein.
The diagram below represents a mammalian kidney tubule (nephron) and its blood supply. Parts indicated by the guidelines 1 to 8 are as follows:
1. U-shaped loop of Henle
2. Proximal convoluted tubule with blood capillaries
3. Bowman’s capsule
4. Afferent arteriole from the renal artery
5. Glomerulus
6. Venule to the renal vein
7. Collecting tubule
8. Distal convoluted tubule with blood capillaries Study the diagram and answer the following questions in each case:
(i) Where does ultrafiltration take place?
(ii) Which structure contains the lowest concentration of urea?
(iii) Which structure contains the highest concentration of urea?
(iv) Which structure contains the lowest concentration of glucose?
(v) Where is the most water reabsorbed?
Explain the Term: Ureter
Write the functional activity of the following structure:
Glomerulus
Choose the correct option.
Specific gravity of urine would _______ if level of ADH increases.
Choose the correct option.
What is micturition?
The tadpole of frog lives in water, hence its mode of excretion is ______.
Osmoregulation maintains the osmolarity of blood at about ______.
