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प्रश्न
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.
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उत्तर
As plants emit CO2 during breathing, plants kept under constant light survive longer. In the case of plants maintained in the dark, CO2 causes a shortage of oxygen, causing the plant to die sooner.
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संबंधित प्रश्न
How is the amount of urine produced regulated?
Why is it necessary to excrete waste products?
Bile, Urea, Uric acid, Ammonia
The nephrons discharge their urine at ______.
Write the functions of Kidney
Write the functions of the Urinary bladder
Name the two parts of a plant through which its gaseous waste products are released into the air.
How are waste products excreted in Amoeba?
Answer the following in short.
What is excretion?
Name the following:
The outer region of kidney containing the Bowman's capsule.
Name the following:
The vein in which urea concentration is maximum
Define the following term :
Renal pelvis
Choose the correct answer:
Composition of extracellular fluid is regulated by ___________
Look at the figure given below. It is a section of human kidney as seen from the front.
Which area/part (give its name and number given on the diagram) which contains the following:
(i) Malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine
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:
Which structure contains the lowest concentration of urea?
Study the diagram given alongside and then answer the question that follow:
Name the stages involved in the formation of urine.
Study the diagram given below and then answer the questions that follow:
 |
- Name the region in the kidney where the above structure is present?
- Name the parts labelled 1, 2, 3 and 4.
- Name the stages involved in the formation of urine.
- What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
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?
Name the following;
Three nitrogenous wastes of our body.
Give reason:
Excretion is a necessary process of our body.
