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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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संबंधित प्रश्न
Match structures given in Column I with functions given in Column II.
| Column I | Column II | ||
| (i) | Stomata | (a) | Absorption of water |
| (ii) | Xylem | (b) | Transpiration |
| (iii) | Root hairs | (c) | Transport of food |
| (iv) | Phloem | (d) | Transport of water |
| (e) | Synthesis of carbohydrates |
The form in which glucose in stored in liver.
Identify the odd one.
The given diagram represents a nephron and its blood supply. Study the diagram and answer the following questions:
(i) Label parts 1, 2, 3 and 4.
(ii) State the reason for the high hydrostatic pressure in the glomerulus.
(iii) Name the blood vessel which contains the least amount of urea in this diagram.
(iv) Name the two main stages of urine formation.
(v) Name the part of the nephron which lies in the renal medulla.
Name the procedure used in the working of artificial kidney.
Name a waste gas released by the plants only during the night time.
What is the role of glomerulus in the kidney?
What does the bladder in our body do?
A dialysis machine contains long tubes coiled in a tank containing dialysing solution
What does the dialysing solution contain?
Tick the most appropriate answer.
The process of removing waste from the body is called
Name the following:
The outer region of kidney containing the Bowman's capsule.
Given below is a set of five terms. Rewrite the terms in their correct order so as to be in logical sequence.
Afferent arteriole, renal vein, secondary capillary network, glomerulus, efferent arteriole.
Differentiate between the following pairs of term :
Renal cortex and renal medulla
Define the following term :
Renal pelvis
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Where is most water reabsorbed ?
Complete the following sentence with appropriate word:
______ is the functional unit of kidney.
Write the functional activity of the following structure: Renal vein
Answer the following question.
State the role of liver in urea production.
Among the following animals, the best conserver of water is ______.
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons.
