Advertisements
Advertisements
Question
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?
Advertisements
Solution
(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.
APPEARS IN
RELATED QUESTIONS
How is the amount of urine produced regulated?
Match structures given in Column I with functions given in Column II.
| Column I | Column II | ||
| (i) | Stomata | (a) | Absorption of water |
| (ii) | Xylem | (b) | Transpiration |
| (iii) | Root hairs | (c) | Transport of food |
| (iv) | Phloem | (d) | Transport of water |
| (e) | Synthesis of carbohydrates |
Fill in the following blank with suitable word:
Bowman's capsule and tubule taken together make a..........
Put a tick mark (✓) against the most appropriate alternative in the following statement :
In human beings, urea is produced in :
Write True (T) or False (F) for the following statement. Rewrite the false statement in the correct form.
Urine is devoid of blood cells.
Tick the most appropriate answer.
The process of removing waste from the body is called
Name the following:
The vein in which urea concentration is maximum
In summer the urine is slightly thicker than in winter explain the reason.
Fill in the blanks in the following passage to make it a meaningful description.
In a nephron, the ______ flows through the ______ under great pressure. The reason for this great pressure is that the ______ (outgoing) ______ is narrower than the ______ (incoming). This high pressure causes the ______ part of the blood to filter out from the ______ into the ______ capsule.
Define the following term:
Osmoregulation
Name the Following
The structural and functional units of kidney
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.
The tadpole of frog lives in water, hence its mode of excretion is ______.
The number of ATP molecules required to produce one molecule of urea from the omithine cycle.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
In a person the tubule part of the nephron is not functioning at all. What will its effect be on urine formation?
Explain the importance of soil for plant growth.
Give two examples of the following:
Water-soluble vitamins
