class 8 worksheet 

 Reaching the Age of Adolscence.

Fill in the blanks :

1.The period of life, when the body undergoes changes, leading to reproductive maturity is called _____________________.

2.The age at which reproductive organs become functionally active is called ____________________________.

3.Increase in height occurs during _______________________.

4.____________________ are external characters which are directly not involved in the process of reproduction.

5.The changes which occur during adolescence are controlled by ________________________________.

6.The hormones are produced in special organ are called __________________________________.

7.Endocrine glands are also called _______________________ glands.

8.In frog metamorphosis is controlled by _____________________ hormone.

Answer the following :

1. Name the sex hormone in humans.

2. Name the disease caused due to deficiency of the hormone thyroxine.

3. Name the hormone produced by the adrenal gland.

4. Name the master gland.

5. What are the type of sex hormones produced by males ?