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Question
Name a waste gas released by the plants only during the night time.
Solution
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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RELATED QUESTIONS
Describe the structure and functioning of nephrons.
the biological/technical terms for the hormone increasing reabsorption of water by kidney tubules
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.
Name the two parts of a plant through which its gaseous waste products are released into the air.
What is the role of glomerulus in the kidney?
A dialysis machine contains long tubes coiled in a tank containing dialysing solution Of what substance are the tubes made?
The excretory unit in the human excretory system is called:
Fill in the blank :
Nitrogenous wastes in the urine are in the form of urea and .....................
Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.
 |
- Define excretion.
- Why does the cortex of the kidney show a dotted appearance?
- Why does the medulla of the kidney show a striped appearance?
- Write two differences in the composition of the blood flowing through the blood vessels 'A' and 'B'.
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
The process by which kidneys regulate the water content of the body.
Give Technical Term:
The tube joining the kidney to the urinary bladder.
Give Technical Terms
The hormone that helps increase the reabsorption of water from the kidney tubules.
Complete the following sentence with appropriate words:
The outer surface of the kidney is ______ while the inner surface is ______.
Choose the correct option.
Deproteinised plasma is not found in ______.
Answer the following question.
State the role of liver in urea production.
Among the following animals, the best conserver of water is ______.
In a person the tubule part of the nephron is not functioning at all. What will its effect be on urine formation?
Leaves of a healthy potted plant were coated with vaseline. Will this plant remain healthy for long? Give reasons for your answer.
Name the following;
Three nitrogenous wastes of our body.
