Explain the Term Haemodialysis. - Science and Technology 2


Explain the term haemodialysis.



(1) Haemodialysis is a technique used to clean blood.
(2) When the kidneys are affected due to injury, infections or restricted blood flow, they are unable to filter out nitrogenous wastes from the blood. This results in the accumulation of wastes, a condition called kidney failure.
(3) A dialyser or dialysing machine is used to remove nitrogenous wastes from the blood.
(4) At one time, about 500 ml blood is passed through the dialyser. The purified blood is pumped back into the patient’s body.

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2013-2014 (March)


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Match structures given in Column I with functions given in Column II.

Column I Column II
Stomata Absorption of water
Xylem Transpiration
Root hairs Transport of food
Phloem Transport of water
  Synthesis of carbohydrates

Fill in the blanks.

Sweat contains water and ______

Fill in the blanks.

Kidneys eliminate the waste materials in the liquid form called ______.

What are stomata? Give two functions of stomata.

Why is it necessary to excrete waste products?

Draw a diagram of the human excretory system and label the various parts.

the exact location of the Loop of Henle

Draw the well-labelled diagram of the human excretory system

Write the functions of Kidney

Write the functions of Ureter

Write the functions of the Urinary bladder

Blood in the renal artery or renal vein (Which one has more urea ?)

Name an animal which absorbs oxygen through its moist skin.

Name the procedure used in the working of artificial kidney.

State whether the following statement is true or false:

Some organisms store wastes in body parts.

Define excretion. Name the excretory unit of a kidney.

What are the methods used by plants to get rid of their waste products?

Draw a neat labelled diagram of the human excretory system.

Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.

The excretory unit in the human excretory system is called:

The substance which is not reabsorbed into the blood capillaries surrounding the tuble of a nephron is mainly:
(a) glucose
(b) amino acid
(c) urea
(d) water

The excretory organs in an earthworm are:
(a) nephridia
(b) nephrons
(c) raphides
(d) ureters

Put a tick mark (✓) against the most appropriate alternative in the following statement : 

 In human beings, urea is produced in :

Fill in the blank :

Nitrogenous wastes in the urine are in the form of urea and ..................... 

Why is excretion necessary in living beings?

State if the following statement is true or false. Correct the statement if it is false.  

Liver produces bile pigments from the hemoglobin of broken RBCs.

Tick the most appropriate answer. 

The process of removing waste from the body is called

Tick the most appropriate answer. 

Quinine is used in the treatment of

Fill in the blank.  

Malpighian body consists of Bowman’s capsule and ..................... 

Answer the following in short.

What is excretion? 

Answer the following in detail.

Describe the process of urine formation. 

Answer the following in detail.

Explain the process of transpiration. Describe some factors that affect it. 

Define the following term : 


Explain the difference between the excretory system of humans and plants. 

Explain in your own words with suitable examples. 

How does excretion occur in human beings?

Look at the figure given below. It is a section of human kidney as seen from the front.

Which area/part (give its name and number given on the diagram) which contains the following:

(i) Malpighian capsule

(ii) The pyramids

(iii) Freshly collected urine

Answer the following question:
Explain the human excretory system with the help of a suitable diagram.

Explain the functioning of kidney.

Given below is a simple diagram of the human kidney cut open longitudinally. Answer the following questions:

(v) Write two differences in the composition of the blood flowing through blood vessels A and B.

Explain the Term: Glomerulus

Name the Following
The structural and functional units of kidney

Name the Following
The branch of renal artery which enters into Bowman’s capsule.

Name the Following
The process by which kidneys regulate the water content of the body.

Choose the correct option.

Which one of the following organisms would spend maximum energy in the production of nitrogenous waste?

Choose the correct option.

Deproteinised plasma is not found in ______.

Choose the correct option.

Hypotonic filtrate is formed in _______.

Choose the correct option.

The part of nephron which absorbs glucose and amino acid is ______.

Answer the following question.

Name any one guanotelic organism.

Answer the following question.

State the role of liver in urea production.

Answer the following question.

Why do we get bad breath after eating garlic or raw onion?

Answer the following question.

Amphibian tadpole can afford to be ammonotelic. Justify.

Answer the following question.

Birds are uricotelic in nature. Give reason.

Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.

The tadpole of frog lives in water, hence its mode of excretion is ______.

Identify the INCORRECT match.

Adult frog is an amphibian, its mode of excretion is ______.

Osmoregulation maintains the osmolarity of blood at about ______.

In order to maintain homeostasis or constant internal environment . ______' is essential.

When uric acid is produced in excess, it gets deposited in joints, resulting in ____________.

Bilirubin and Biliverdin are pigments which are ____________.

Elimination of nitrogenous wastes in the form of uric acid takes place in ____________.

Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?

Identify the correct labels for A and B in the following diagram


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