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प्रश्न

How are waste products excreted in Amoeba?

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उत्तर

Amoeba excretes excess carbon dioxide, water and ammonia. Carbon dioxide is excreted by diffusion through the cell membrane, while excess water and nitrogenous waste like ammonia is removed by the contractile vacuole.

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अध्याय 1: Life Processes - Exercise 3 [पृष्ठ ७४]

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लखमीर सिंग Biology Part 3 [English] Class 10
अध्याय 1 Life Processes
Exercise 3 | Q 43.2 | पृष्ठ ७४

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संबंधित प्रश्न

Mention the exact location of the Prostate gland.


The form in which glucose in stored in liver. 


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?


Explain Selective reabsorption


Name the procedure used in the working of artificial kidney.


Explain the principle of dialysis with the help of a labelled diagram.


If a patient is out on dialysis, he is most likely suffering from a severe ailment of the:
(a) circulatory system
(b) respiratory system
(c) excretory system
(d) digestive system


The excretory unit in the human excretory system is called:


If you donate one kidney to a needy patient, would it cause any harm to you? Give reason. 


Look at the figure given bellow, it is a section of human kidney as seen from the front.  

  

Is it a longitudinal section or a cross-section?


Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.

  1. Define excretion.
  2. Why does the cortex of the kidney show a dotted appearance?
  3. Why does the medulla of the kidney show a striped appearance?
  4. Write two differences in the composition of the blood flowing through the blood vessels 'A' and 'B'.

 Correct and rewrite the statements by changing the biological term that is underlined for the statement: 
The kidney is composed of number of neurons. 


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?


Complete the following sentence with appropriate word:

Human kidney is made up of ______.


Complete the following sentence with appropriate word:

The U-shaped portion of a nephron located in the medulla region is called ______.


Choose the Odd One Out:


Choose the correct option.

Which one of the following organisms excrete waste through nephridia?


Answer the following question.

State the role of liver in urea production.


The tadpole of frog lives in water, hence its mode of excretion is ______.


Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?


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