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प्रश्न
Explain the principle of dialysis with the help of a labelled diagram.
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उत्तर
Principal of dialysis:
The procedure of dialysis is based on diffusion of solutes and ultrafiltration of fluid across a semi-permeable membrane. In dialysis, the blood from a convenient artery is pumped into the dialyser of a dialysing machine. A dialyser contains a coiled cellophane tube surrounded by the dialysing solution. The dialysing solution contains water, glucose and salts, which are similar in concentration to those in normal blood. The porous cellophane membrane of the tube allows the passage of molecules based on concentration gradient. As the patient’s blood is passed through the dialysing solution, most of the wastes (like urea) present in it pass through the selectively permeable cellulose tubes into the dialysing solution, thereby cleaning the blood. The clean blood is pumped back to the body through a vein.
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संबंधित प्रश्न
What are the methods used by plants to get rid of excretory products?
The nephrons discharge their urine at ______.
The form in which glucose in stored in liver.
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
What does the bladder in our body do?
Why do some people need to use a dialysis machine? What does the machine do?
Explain the difference between the excretory system of humans and plants.
Choose the correct answer:
What happens if one kidney is removed from the body of human being?
Study the diagram given alongside and then answer the question that follow:
Name the parts labelled 1, 2, 3, and 4.
Explain the functioning of kidney.
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.
State the Location: Medulla of Kidney
Write the functional activity of the following structure: Renal vein
Choose the correct option.
Deproteinised plasma is not found in ______.
Choose the correct option.
The part of nephron which absorbs glucose and amino acid is ______.
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons.
Give two examples of the following:
Nitrogenous waste
Give two examples of the following:
Main excretory organs
