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प्रश्न
What do kidneys excrete?
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उत्तर
Kidneys remove the poisonous substance (urea), other waste salts and excess water from the blood, and excrete them in the form of urine.
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संबंधित प्रश्न
Draw a diagram of the human excretory system and label the various parts.
Explain Selective reabsorption
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 an animal which absorbs oxygen through its moist skin.
What is urethra?
Explain the principle of dialysis with the help of a labelled diagram.
In which of the following are the largest amounts of nitrogen excreted from a mammalian body?
(a) breath
(b) sweat
(c) urine
(d) faeces
The excretory unit in the human excretory system is called:
Fill in the blank.
Malpighian body consists of Bowman’s capsule and .....................
Answer the following in detail.
Explain the process of transpiration. Describe some factors that affect it.
In humans, urea is formed in
Name the following:
The vein in which urea concentration is maximum
Why is it necessary to maintain a normal osmotic concentration of the blood?
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'.
Explain the difference between the excretory system of humans and plants.
Choose the correct answer:
The smallest functional unit of the kidney is ____________
Give Technical Term:
The tube joining the kidney to the urinary bladder.
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?
What is the purpose of making urine in the human body?
