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प्रश्न
The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person's life, the blood from an artery in the person's arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person's blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation.
(a) What are organs A?
(b) Name the waste substance B.
(c) What are (i) E, and (ii) F?
(d) Name G, H and I.
(e) What is the process described above known as?
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उत्तर
(a) Organ A is kidney. Complete damage of the kidney (organ A) can lead to the accumulation of waste material B, i.e. urea, in the blood.
(b) The waste substance B is urea.
(c)
(i) In dialysis, the blood from a convenient artery is pumped into the dialyser of a dialysing machine. The dialyser contains a coiled cellophane tube made of substance E, called cellulose. It is surrounded by the dialysing solution (F). Hence, E represents cellulose.
(ii) F represents the dialysing solution.
(d) The dialysing solution contains water (G), glucose (H) and salts (I), which is similar in concentration to those in normal blood.
(e) The process of removing waste substances like urea from the blood using a kidney machine is known as dialysis.
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संबंधित प्रश्न
Differentiate between the following pair on the basis of what is indicated in the bracket.
Ureter and Urethra [function]
What is the role of glomerulus in the kidney?
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
What is urethra?
If you donate one kidney to a needy patient, would it cause any harm to you? Give reason.
Differentiate between the following pairs of term :
Renal cortex and renal medulla
Define the following term:
Micturition
Given below is a diagram of a human kidney, cut open longitudinally. Answer the following:
(i) Give definition of excretion.
(ii) Name the unit of kidney.
(iii) Why does the cortex of kidney show dotted appearance?
(iv) List the functions of the kidney.
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Write two differences in composition of the blood flowing through the blood vessels, 'A' and 'B'.
Given below is a simple diagram of the human kidney cut open longitudinally. Answer the following questions:
c
(v) Write two differences in the composition of the blood flowing through blood vessels A and B.
Give Technical Term:
The organ which filters out urea and uric acid from the bloodstream.
Complete the following sentence with appropriate word:
Human kidney is made up of ______.
Choose the correct option.
Specific gravity of urine would _______ if level of ADH increases.
Choose the correct option.
The minor calyx _______.
Answer the following question.
Amphibian tadpole can afford to be ammonotelic. Justify.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
What is the purpose of making urine in the human body?
Give two examples of the following:
Main excretory organs
The process of removal of unwanted metabolic wastes from the body is called ______.
