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प्रश्न
What do kidneys excrete?
उत्तर
Kidneys remove the poisonous substance (urea), other waste salts and excess water from the blood, and excrete them in the form of urine.
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संबंधित प्रश्न
What are the methods used by plants to get rid of excretory products?
Why is it necessary to excrete waste products?
_____________ secreted by the (ii) _____________ lobe of the pituitary gland. If this hormone secretion is reduced, there is an increased production of urine. This disorder is called (iii) ____________. Sometimes excess glucose is passed with urine due to hyposecretion of another hormone called (iv) _____________ leading to the cause of a disease called (v) ______________.
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).
State whether the following statement is true or false:
Some organisms store wastes in body parts.
Explain the principle of dialysis with the help of a labelled diagram.
In which of the following are the largest amounts of nitrogen excreted from a mammalian body?
(a) breath
(b) sweat
(c) urine
(d) faeces
The procedure of cleaning the blood of a person by using a kidney machine is known as:
(a) ketolysis
(b) hydrolysis
(c) dialysis
(d) photolysis
Put a tick mark (✓) against the most appropriate alternative in the following statement :
In human beings, urea is produced in :
Fill in the blank.
.................. produces bile pigments from the heamoglobin of broken RBCs.
Differentiate between
excretion and transpiration
One of the following sets of body parts or substances or processed, pick out the one item which overall includes the remaining foir.
Skin, liver, lungs, kidneys, excretion.
In summer the urine is slightly thicker than in winter explain the reason.
Define the following term :
Renal pelvis
What is dialysis? Under what condition is it carried out?
Choose the odd one out in the following serie:
Column of Bertini, minora calyces, brain.
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Where is most water reabsorbed ?
Explain the Term: Glomerulus
Complete the following sentence with appropriate word:
Human kidney is made up of ______.
“All plants give out oxygen during the day and carbon dioxide during the night”. Do you agree with this statement? Give a reason.
