NCERT Solutions For Class 8 Science Chapter 7 Reaching The Age Of Adolescence SAQs

NCERT Solutions For Class 8 Science Chapter 7 Reaching The Age Of Adolescence SAQs

Question 1. Who should be involved Inking modelclnos/drug unions prescribed by n doctor? Give Ronsons.
Answer:

We should avoid hiking medications/drugs unless prescribed by a doctor because several medicines have adverse side effects and have specific dosage levels, which, if not followed, may harm the body. Drugs can be addictive too and can ruin our health and happiness.

Question 2. Given below are certain food Items required for proper nourishment of the child, cents. Name the nutrients present in the food Items and write their functions.
Answer:

Reaching the Age of Adolescence Class 8 SAQs

Question 3. Paheli and Boojho realised that a sudden increase in height and the hairy line above the lips in boys were signs of adolescence. They wanted to know about other changes at puberty.
Answer:

The other changes in the body are as follows

1. Change in body shape.
2. Increase in height.
3. Increased activity of sweat and sebaceous glands.

Question 4. Paheli and Boojho have now understood that puberty marks the beginning of the reproductive period when one becomes capable of reproduction. But they want to know if reproductive life once begins, it continues, or it ends sometime.
Answer:

The capacity for maturation and production of gametes lasts for a much longer time in males than in females. In females, the reproductive phase of life begins at puberty (10 to 12 years of age) and generally lasts till the age of approximately 45 to 50 years.

NCERT Solutions for Reaching the Age of Adolescence Chapter 7

Question 5. List changes in the body that take place at puberty.
Answer: At puberty, the body undergoes the following changes

• Bow and girls become capable of reproduction
• Sudden increase in height.
• Broad shoulders and wide chests in boys, and the region below the waist becomes wider in girls.
• Growth of hair on different parts of the body.
• The voice of girls becomes high-pitched, and that of boys becomes deep.
• Secretions of sweat and sebaceous glands increase.
• Sex organs become active. In boys, the testes start to form sperm, and in girls, the ovaries enlarge and eggs begin to mature.
• Changes at the mental, intellectual, and emotional level.

Reaching the Age of Adolescence Class 8 SAQs

Question 6. Prepare a table having two columns depicting the names of endocrine glands and the hormones secreted by them.
Answer:

The table is shown below.

Class 8 Chapter 7 Reaching the Age of Adolescence Short Answer Questions

Question 7. What are sex hormones? Why are they named so? State their functions.
Answer:

The hormones that are responsible for the male and female secondary sexual characteristics are called sex hormones.

They are called sex hormones as they control the sexual activities and help us to distinguish boys from girls. In boys, sex hormones control the formation of sperm by the testes and the growth of facial hair, etc., and in girls, they help to develop breasts, control the menstrual cycle, etc.