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प्रश्न
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
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उत्तर
Aquatic species breathe more quicker than terrestrial organisms because oxygen supply in water is lower than on land, hence aquatic organisms must work harder to collect the oxygen they require.
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संबंधित प्रश्न
How is the amount of urine produced regulated?
Draw a diagram of the human excretory system and label the various parts.
What is the role of glomerulus in the kidney?
Draw a neat labelled diagram of the human excretory system.
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
Answer the following in detail.
Explain the process of transpiration. Describe some factors that affect it.
Differentiate between the following pairs of term :
Renal cortex and renal medulla
Define the following term :
Renal pelvis
Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.
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- 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'.
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The kidney is composed of number of neurons.
Choose the correct answer:
Composition of extracellular fluid is regulated by ___________
Name the following:
Functional unit 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?
Explain the Term: Ureter
Complete the following sentence with appropriate word:
The sum total of all the chemical reactions taking place in the cell is known as ______.
Complete the following sentence with appropriate word:
______ supplies blood to kidney.
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.
Explain the importance of soil for plant growth.
Give reason:
Excretion is a necessary process of our body.
