Page 2 :
Question 1., , What is the term used for secretions of endocrine, glands responsible for changes taking place in the, body?, , Answer:, , Hormones, , Question 2., , Define adolescence., , Answer:, , The period of life, when the body undergoes, changes, leading to reproductive maturity, is called, adolescence. The period of adolescence is, normally 11 years to 19 years., , ‘Scanned with CamScanner

Page 3 :
Question 3., , What is menstruation? Explain., , Answer:, , In females, the ova or eggs begin to mature with, the onset of puberty (10 to 12 years of age) one, egg get matured and is released by one of the, ovaries once in about 28 to 30 days. During this, period, the wall of the uterus becomes thick so as, to receive the fertilized egg. In case it is fertilized, it, begins to develop. This results in pregnancy. If the, fertilization fails to take place, the ovum or the, released egg and the thickened lining of the uterus, along with its blood vessels are shed off. This, causes bleeding in women. This is called, menstruation. It occurs once in 28 to 30 days., , ‘Scanned with CamScanner

Page 4 :
Question 4., , List changes in the body that take place at puberty., Answer:, , The changes take place differently in the body of, , boys and girls at puberty. These change may be, listed as below:, , ‘Scanned with CamScanner

Page 5 :
e There is sudden increase in the height of, both boys and girls. However, both reach, their maximum height at the age of 17 to 18, years., , ° The voice of boys become hoarse and that of, girls become shrill., , e Shoulders become broader and muscles, grow more prominently in boys. In girls, the, regions below the waist becomes wider., , e Hair start growing in different parts of boys, and girls., , e In most of the teenagers, due to increased, secretion of sweat and sebaceous gland, get, acne and pimples on their face., , e Onset of puberty brings changes in, secondary sexual characters in both male, and female., , Boys and girls become capable of, reproduction., , e Ingirls, menstruation starts., , ° Different types of hormones start to release, in initiating a reproductive function., , , , ‘Scanned with CamScanner