Q1 of 13 Page 159

Adolescents sometimes experience various mood swings such as being happy, sad, angry, excited or irritated. What makes them behave so?

Various mood swings such as being happy, sad, and angry, excited or irritated are the emotions that adolescents experience as they reach the stage of puberty. This is because of the hormones secreted by the endocrine glands of human body.


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2

The deficiency of thyroxine hormone in children is cretinism. It slows down growth. Apart from this, write one more disorder.

 3

Note the endocrine glands given in column A with their respective hormones in column B.

 4

Give reasons for the following.

Smoking increases the risk of blood clots.

 4

Give reasons for the following.

Smoking aggravates asthma.