Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 9 English Medium Biology Excretion to maintain Homeostasis

Complete the table suitably.
| Organism | Excretory organ | Excretory material |
| Bird | a) ......... | Uric acid |
| Fish | b) ....... | c) ......... |
| d) ....... | Nephridia | Urea, ammonia, Water |
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Fill the blanks based on the indications on plant excretion.
|
Excretory machanism |
Location |
Excretory product |
|
a.......................... |
In the epidermis of leaves |
c................ |
|
b......................... |
In the edges of the leaves of shrubs and grasses |
d.................. |
a) Stomata
b) Hydathode
c) Water and carbon dioxide
d)
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Kidney diseases of two person are given. Identify the disease and give reasons.
Person A
Turbid and dark coloured urine
oedema on face and ankle
Person B
Pain in the lower abdomen
blockage of urine
a) Nephritis
b) Kidney stone
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A disease condition of a person is given below.
Due to the non functioning of the two kidnyes, urea and other excretory products remain in the blood.
a) Identify the disease?
b) Propose a technology to solve this issue.
c) Who deviced this mechanism?
a) Uremia
b) Hemodialysis
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Some excretory organs of animals are given below. Read them and identify the organs.
a) . They separate wastes from the body cavity and expel them through small pores on the body surface.
b) They separate excretory products from the body fluids and eliminate them along with digestive wastes.
a) Nephridia
b) Malphighian
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Analyse the hint and answer the questions.
-Efferent vessel has less diameter than afferent vessel.
a) How does the difference in the afferent- efferent vessels influence the process of ultrafiltration?
b) Name the product formed as a result of ultrafiltration.
When blood flows through the glomerulus, ultrafiltration takes place through its small pores. This process is supported by the high pressure
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Name the persons based on the hints.
1. Introduced the first artificial kidney.
2. Conducted first kidney transplantation operation.
1. Willem Johan Kolff.
2.. Dr. Joseph
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Prepare answers to the following questions for a student who conducts a seminar on Kidney transplantation.
1. What is the source of kidney for transplantation?
2. When does the need for a kidney transplantation?
1. Kidney of a healthy person who died in an accident or of a completely healthy person on donation.
2. When both the kidneys fail to
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Based on the given model, fill the blanks.
Model- Amoeba: Contractile vacoule: Ammonia
1. Frog : a) ……………….. b) ………………..
2. c) ……………….. : Malphighian tubules, d) ………………..
1. Frog : a) Kidney b) Urea
2. c) insect : Malphighian tubules, d) Uric
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The stages of hemodialysis are given. Arrange them in the correct order.
1. Purified blood is allowed to pass through veins.
2. Blood with high quantity of waste materials is passed into the dialysis unit.
3. Heparin is added to blood to prevent blood clotting.
4.Blood when passes through the cellophane tube of the dialysis unit, the wastes contained in blood diffuse to dialysis fluid.
1. Blood with high quantity of waste materials is passed into the dialysis unit.
2. Heparin is added to blood to prevent blood clotting.
3. Blood
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Analyse the indications and identify the kidney diseases.
a) Inflammation of kidneys due to infection or intoxication
b) Deposition of crystals of calcium salts in kidney or urinary tract.
c) Kidney disease due to diabetes or high blood pressure.
a) Nephritis
b) Kidney stone
c)
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Analyse each of the following and write their differences.
a) Reabsorption and Secretion
b) Glomerular filtrate and urine.
a) Reabsorption- When glomerular filtrate flows through renal tubules to the collecting duct, essential components are reabsorbed to the peritubular capillaries.
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Complete the following table suitably.
|
Part |
Characteristics |
Function |
|
Renal tubule |
Opens into pelvis |
Water absorption |
|
Glomerulus |
Begins from the Bowman's capsule |
Re absorption |
|
Collecting duct |
Collection of capillaries |
Filtration of blood. |
Complete the following table suitably.
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Analyse each of the following and write their differences.
a) Reabsorption
b) Glomerular filtrate
a) Reabsorption- When glomerular filtrate flows through renal tubules to the collecting duct, essential components are reabsorbed to the peritubular capillaries.
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Analyse the indications and identify the kidney diseases.
a) Inflammation of kidneys due to infection or intoxication
b) Deposition of crystals of calcium salts in kidney or urinary tract.
c) Kidney disease due to diabetes or high blood pressure.
a) Nephritis
b) Kidney stone
c)
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How does sweat form? What is its function?
Sweat glands in the skin produce sweat. The sweat glands are surrounded by blood capillaries at their base. When blood flows through these capillaries, salt and water
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Write the difference in the function of the following blood vessels.
1. Renal artery2. Renal vein
1. Renal arter conveys impure blood to the kidneys.
2. Renal vein conveys purified blood out of the
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Based on the indicators, identify the parts and name them.
1. The dark coloured inner part of the Kidney.
2. Region where urine from the filters flows into.
3. Part where the nephrons are found.
4. The outer part of the kidney.
1. Medulla
2. Pelvis
3. Medulla
4.
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Analyse the following equation and answer the following questions.
Enzymes
Ammonia + Carbonndioxide + Water ------------→ Urea
a) Where does ammonia form?
b) In which organ does ammonia is converted into urea?
c) What is the reason for the elimination of urea from the body?
a) Due to the metabolism of aminoacids produced as a result of the decomposition of preteins in the cells.
b) Liver
c) Ammonia is harmful to human
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A and B are excretory wastes. Complete the illustration.
A. Urea
B. Ammonia
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Copy the diagram and label according to the indications.
1. The blood vessel conveying blood to the kidney.
2. The filters from which blood flows into.
3. The part of nephrons where Bowman's capsule is seen.
1. Renal artery
2. Pelcis
3.
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A part of kidney is shown magnified.
Identify A and B.
A. Cortex
B. Medulla
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Make corrections if nay in the underlined parts of the following statements.
1. Blood undergoes the filtration process in the glomerulus.
2. Glomerular filtrate is formed in the collecting duct due to ultra filtration.
3. When glomerular filtrate flows towards the collecting duct, many materials are absorbed into the peritubular capillary network.
4. After the absorption of excess water from the glomerular filtrate, it becomes urine.
5. The excess glucose and water stored in blood are excreted into the peritubular capillary network.
2. Glomerular filtrate is formed in the collecting duct due to ultra filtration.
5. The excess glucose and water stored in blood are excreted into the
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The floowing flow chart depicts the flow of blood throguh the blood vessels in nephron.
Afferent vessel--------------> Efferent vessel------------------> Glomerulus-------->Peritubular capillary network
Afferent vessel-----> Glomerulus------> Efferent vessel -----> peritubular capillary
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| Organism |
Excretory
|