THESE NOTES ARE PREPARED ACCORDING TO JKBOSE SYLLABI IN SIMPLIFIED AND CONCISE PATTERN
Exercises
Q. What is the term used for the secretions of endocrine glands responsible for changes taking place in the body?
Ans: The term used for the secretion of endocrine glands responsible for changes taking in the body is Hormone.
Hormones are chemical messengers that send signals from glands to body parts.
Q. Define Adolescence?
Ans: Adolescence is a period in which an individual starts to grow and develops from a child into an adult. In this period physical, mental, sexual growth takes place.
Q. What is mensuration? Explain
Ans: When the egg produced by ovary does not get fertilized. It gets discarded off rupturing thick lining of uterus and blood vessels. This results in bleeding and is called mensuration.
It occurs in females after every 28 days.
Q. List the changes in the body that take place at puberty?
Ans: The changes that take place at the time of puberty are:
a. Increase in height and weight.
b. Growth of hair on different body parts.
c. Maturation of sex organs resulting in production of eggs and sperms.
d. Broadening of shoulders and chest in boys and waist in girls.
e. Acne and pimples
f. change in voice.
Q. Prepare a table having two columns depicting names of endocrine glands and hormones secreted by them?
Ans:
Q. What are Sex hormones? Why are they named so? State their function?
Ans: Sex hormones are the hormones that are responsible for primary and secondary sexual characters in human beings. E.g
Testosterone, Oestrogen, Progesterone.
Testosterone is responsible for production of sperms and secondary sexual characters in boys.
Oestrogen and Progesterone is responsible for development of eggs and secondary sexual characters in girls.
Q. Choose the correct option.
a. Adolescents should be careful about what they eat, because:
Ans:
ii. Proper diet is needed for the rapid growth taking place in their body.
b. Reproductive age in women starts when their
Ans:
i. Mensuration starts.
c. The right meal for adolescents consist of:
Ans:
ii. Chapati, Dal, Vegetables
Q. Write a note on:
a. Adams apple
b. Secondary sexual characters
c. Sex determination in unborn babies.
Ans:
a. Adams Apple:
It is the protruding voice box in boys. It occurs during puberty.
b. Secondary sexual characters:
These are the distinguishing features that appear in boys and girls during puberty. They include change in voice, development of breast, broadening of shoulders, broadening of waist, growth of hair.
c. Sex determination in unborn babies:
Sex in unborn babies is determined by pair of sex chromosomes. In humans there are 23 pairs of chromosomes in which one pair is sex chromosome. Males have XY and Females have XX sex chromosomes.
If sperm containing X chromosomes of male fertilizes egg of female, the baby will have XX chromosomes and will be girl.
If sperm containing Y chromosome of male fertilizes egg of female, the baby will have XY chromosomes and will be boy.
Q. Use the clues to work out the words
Across:
3. Protruding voice box in boys
4. Glands without ducts
7. Endocrine glands attached to brain
8. Secretions of endocrine glands
9. Pancreatic hormone
10. Female Hormone
Down
1. Male hormone
2. Secretes Thyroxine
3. Another term for teenage
5. Hormone reaches here via blood stream
6. Voice box
7. Change at adolescence
Ans:
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