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Published on: 21/10/2025
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Questions + Answers key
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1.
Name the disease or side effects caused by deficiency of following hormones:
(a) Thyroxine
(b) Insulin
(c) Adrenaline
(d) Growth hormone.
2.
What are sex hormones? Why are they named so? State their functions.
3.
Write four ways through which AIDS is transmitted.
4.
Name some endocrine glands other than pituitary gland.
5.
Name the other term for 'adolescents'.
6.
Protruding part of the throat in a boy is called
Voice box
Larynx
Adam's Apple
All of these
7.
The release of an egg from an ovary is called
fertilisation
menopause
menstruation
ovulation
8.
The male hormone is
oestrogen
progesterone
testosterone
All of the above
9.
The beginning of menstruation at puberty is called
ovulation
menstruation
menarche
menopause
10.
The faulty functioning of an endocrine gland can make a person very short or very tall. This gland is
thyroid
pituitary
adrenal
pancreas
11.
What do you mean by metamorphosis?
12.
Name a dangerous viral disease
13.
What is puberty?
1.
(i) Thyroxine is produced by thyroid gland. Its deficiency Causes 'goitre' disease
(ii) A person suffers from diabetes if pancreas does not produce the hormone insulin in sufficientquantities
(iii) Adrenal glands produce hormone adrenaline, which helps the body to adjust to stress, when a person is very angry, embarrassed or worried.
(iv) Pituitary gland secretes growth hormone that is necessary for the normal growth of a person
2.
(i) The hormones which are responsible for the male and female secondary sexual characters are called sex hormones.
(ii) They are called sex hormones as they control the sexual activities and help us to distinguish boys from girls.
(iii) In boys, sex hormones control formation of sperms by testes and growth of facial hair, etc and in girls, they help to develop breasts, control menstrual cycle, etc.
3.
Four ways through which AIDS is transmitted are -
(i) Sharing the syringes for injecting drugs.
(ii) Unprotected sex with an infected person.
(iii) Transfusion of blood into a healthy person from an infected person.
(iv) Through milk from an infected mother to Infant.
4.
Some endocrine glands are thyroid pancreas and adrenals
5.
Teenagers can be used as a substitute for adolescents.
6.
(c)
Adam's Apple
7.
(d)
ovulation
8.
(c)
testosterone
9.
(c)
menarche
10.
(b)
pituitary
11.
( )
The change from larva to an adult is called metamorphosis
12.
( )
AIDS by virus HIV.
13.
( )
The human body undergoes several changes during adolescence.Thesechangesmark the onset of puberty
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