During adolescence, the body of boys and girls undergoes certain changes. Given below are a few of those changes.
(a) Broad shoulders
(b) Wider chests
(c) Wider region below waist
(d) Development of muscles
(e) Development of mammary glands
(f) Growth of facial hair
(g) Acne and pimples on face
(h) Development of sex organs
(i) High-pitched voice
(j) Growth of pubic hair.
Categorise these changes into those that occur in boys and those that occur in girls and fill in the table given below.
Body changes during Adolescence
Boys Girls
————————— —————————
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Read the statements given below and fill up the blanks with the correct words listed in the box.
deep, ductless, nutrients, thyroxine
(a) The meal that includes all __________ is a balanced diet.
(b) Insufficient production of __________ in the tadpoles leads to their incomplete development.
(c) Endocrine glands are also called __________ glands.
(d) After attaining puberty boys develop a__________ voice.
A few of Paheli’s classmates eat potato chips and burgers
regularly during the recess at school. Are they healthy eating
habits? Give reasons.
We should avoid taking medicines/drugs unless prescribed by a
doctor. Give reasons.
Mention any two features each that are seen in boys and girls
each to distinguish them from each other at puberty
Lila always eats only dal and rice in every meal. She often falls ill
and has become prone to diseases. Can you suggest changes in
her diet which can make her healthy and free from disease?
Match the hormones given in Column A with their deficiency
disease given in Column B.
Column A Column B
(a) thyroxine (i) salt imbalance
(b) growth hormone (ii) diabetes
(c) Insulin (iii) goitre
(d) Adrenal hormone (iv) Dwarfism
Name the female hormone produced by ovaries that helps in development of mammary glands.
Name the hormone that is released by testes at the onset of puberty.
Give a suitable word for each of the following statements.
(a) The site which responds to a hormone.
(b) Name of a gland which transports secretions through ducts.
(c) Chemicals which control changes at adolescence stage.
(d) It marks the beginning of reproductive period.
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