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1
Excretion in many unicellular organisms like Amoeba is done by throwing out their_______________________.
Waste by diffusion from their body surface
Removal of substance and substance present in excess
Removal of substance not required by body
None of these .
2
The organ system responsible for the removal of wastes is called _________________ .
Excretory system
Digestive system
Circulatory system
3
The kidney is ______________.
An oval shaped organ
Bean shaped organ
Rectangular shaped organ
4
In vertebrates the main organs of excretion and maintenance of water balance are the ___________________ .
Kidney
Liver
Heart
5
Different type of waste products get diffused out of the plant body through __________________________ .
Epidermis
Endodermis
Exothermic
6
During dialyses the artificial kidney maintains the balance of ___________ and __________________ salts in a patient whose kidneys have failed.
Sodium and potassium
Iron and carbon
Phosphorus and calcium
7
Kidney failure can be treated by the use of _____________ .
Haemo machine
Dialysis machine
Peritoneal Dialysis
8
Excessive salt present in _______________________ or in the soil it get deposited in plants as crystal.
Mineral
Water
Soil
9
The process of purification of blood in which dialysis through an artificial kidney has to be carried out at frequent intervals is called _________________ .
Chemodialysis
Haemodialysis
Liverdialysis
10
Which of the following are correct ?
(a) Kidneys are the main organs of excretion, the skin, lungs and liver also help in excretion.
(b) The lungs help in getting rid of carbon dioxide, formed as a result of cellular respiration, through exhalation.
Only (a) and (b) is correct .
Only (b) and (c) is correct .
Both (a) and (b) is correct .
All of these .
11
(a) The kidneys are the main organs of excretion, the skin, lungs and liver also help in excretion .
(b) Skin has sweat glands, through which we excrete small amounts of water, urea and salts.
Only (a) is correct .
Only (b) is correct .
12
(a) The process of removal of wastes from the cells of living organisms is called excretion .
(b) The organ system responsible for the removal of wastes is called circulatory system .
13
(b) The organ system responsible for the removal of wastes is called excretory system .
14
(a) Kidneys help the body to pass waste as urine.
(b) Kidneys also help filter blood before sending it back to the Heart.
(c) The kidney perform many crucial functions, including :maintaining overall fluid balance
Only (a) and (c) is correct .
15
(a) The excretory organs of insects (e.g., grasshopper, cockroach and housefly) are tubular and are known as malpighian tubules .
(b) Malpighian tubules remove nitrogenous wastes from the body fluid and help in maintaining the water balance in the body.
(c) In vertebrates the main organs of excretion and maintenance of water balance are the kidneys .