Class 8 Science Worksheet - Reaching the Age of Adolescence

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

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

6.Endocrine glands are also called _______________________ glands.

7.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 ?

6. How many pairs of chromosomes as human body cell contain ?