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Class 10 Excretion | Life processes Important questions

In this page we have Important Questions for Class 10 Life processes Excretion . Hope you like them and do not forget to like , social shar and comment at the end of the page.
a. One Marks Questions
b. Short Answer type
c. Long answer questions

Very Short Answer type

Question 1
How are wastes formed in the body?
Answer
Wastes are formed in the body as by- products of the metabolic activities in the body.

Question 2
Define excretion.
Answer
The removal of harmful and unwanted toxic waste products of metabolism from the body is known as excretion.

Question 3
Define osmoregulation.
Answer
The process by which the water content and the ion concentration is regulated and kept constant in the cells is known as osmoregulation.

Question 4
Name an organ that performs both excretion and osmoregulation.
Answer
Kidney perform both excretion and osmoregulation.

Question 5
What is secretion? Give two examples.
Answer

Secretion is the production of useful chemical substances like hormones, enzymes or other molecules by glands, endocrine glands or specialized cells. For example: The liver secretes bile, the islets of Langerhans secrete insulin, epithelial lining of the large intestine secrete mucus.

Question 6
What is egestion?
Answer
The expelling of undigested wastes from the body in the form of excreta is known as egestion.

Question 7
What are the three main groups of excretory wastes found in animals?
Answer:
The three main groups are

Question 8
Name the two respiratory waste products formed due to catabolism of food?
Answer
The two respiratory waste products formed due to catabolism of food are carbon dioxide and water.

Question 9
Mention four nitrogenous waste produced by animals?
Answer:
Four nitrogenous waste products produced by animals are:

Question 10
In higher animals, what does ammonia react with to produce urea?
Answer
Ammonia reacts with carbon dioxide in the liver tp form a less toxic substance, urea which is periodically flushed out of the system.

Question 11
Name the organ that converts ammonia into urea in higher animals?
Answer
Ammonia is converted into urea in the liver.

Question 12
How are bile pigments formed?
Answer
Bile pigments are formed by the breaking down of hemoglobin present in the red blood cells.

Question 13
Name the organ that destroys worn out red blood cells.
Answer
Worn out red blood cells are destroyed in the liver.

Question 14
Name two bile pigments?
Answer
The two bile pigments are:

Bilirubin
Biliverdin

Question 15
Name the organelle in amoeba that performs excretion and osmoregulation.
Answer
Contractile vacuole in amoeba performs excretion and osmoregulation.

Short Answer type

Question 16
Name two groups of animals in which amino acids are excreted out without undergoing any change?
Answer
Amino acids are excreted out without undergoing any change in:

Mollusks
Echinoderms

Question 17
Name two groups of animals which excrete uric acid in the form of a white paste or pellet?
Answer
Animals which excrete uric acid in the form of a white paste or pellet are:

Birds
Reptiles

Question 18
What would happen to amoeba if osmoregulation did not take place?
Answer
If osmoregulation did not take place the organism would get flooded with water and burst.

Question 19
How does the cell membrane perform excretion in amoeba?
Answer
The cell membrane of Amoeba being semi permeable the carbon dioxide diffuses out of the cell membrane into the surrounding water. The cell membrane forms the general body surface of amoeba.

Question 20
Name two waste products excreted by the skin?
Answer

Two waste products excreted by the skin are:

Sweat
Sebum

Question 21
Mention one difference between sebum and sweat?
Answer
Sebum is secreted by the sebaceous gland. Sweat is secreted by the sweat gland.

Question 22
Where are sebaceous glands found?
Answer
Sebaceous glands are found attached to the hair follicle in the skin of mammals.

Question 23
Mention three excretory substances found in sebum?
Answer
Three excretory substances found in sebum are:

Wax
Fatty acid
Sterols

Question 24
(i)Name the principal excretory organ in man. What does it excrete?
(ii)Why is the right kidney lower than the left?
Answer
(i)The main excretory organ in man are the kidney. They excrete urine.
(ii)The right kidney is lower than the left because of the presence of liver, in the abdominal cavity.

Question 25
Name three beverages that are diuretics?
Answer
Three beverages that are diuretics are:

Coffee
Tea
Alcohol

Long Answer Type

Question 26
Differentiate between afferent arteriole and efferent arteriole.
Answer

Question 27
Describe the process of urine formation in kidneys

Summary

This Class 10 Excretion | Life processes Important questions with answers is prepared keeping in mind the latest syllabus of CBSE . This has been designed in a way to improve the academic performance of the students. If you find mistakes , please do provide the feedback on the mail.

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