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प्रश्न
Name a waste gas released by the plants only during the night time.
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उत्तर
Carbon dioxide is released only during the night because carbon dioxide produced during respiration in completely used up by the plant itself in photosynthesis.
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संबंधित प्रश्न
Draw the well-labelled diagram of the human excretory system
What is the role of glomerulus in the kidney?
A dialysis machine contains long tubes coiled in a tank containing dialysing solution
What does the dialysing solution contain?
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
Fill in the blanks in the following passage to make it a meaningful description.
In a nephron, the ______ flows through the ______ under great pressure. The reason for this great pressure is that the ______ (outgoing) ______ is narrower than the ______ (incoming). This high pressure causes the ______ part of the blood to filter out from the ______ into the ______ capsule.
Explain in your own words with suitable examples.
How does excretion occur in human beings?
Explain the functioning of kidney.
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:
The U-shaped portion of a nephron located in the medulla region is called ______.
Complete the following sentence with appropriate words:
The outer surface of the kidney is ______ while the inner surface is ______.
Write the functional activity of the following structure: Nephron
Choose the Odd One Out:
Choose the correct option.
Which one of the following organisms would spend maximum energy in the production of nitrogenous waste?
Answer the following question.
State the role of liver in urea production.
Answer the following question.
Birds are uricotelic in nature. Give reason.
Elimination of nitrogenous wastes in the form of uric acid takes place in ____________.
If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
Name the following:
The main nitrogenous waste formed in the body.
Salt excreting glands are found near ______ in marine birds like Albatross.
