Class 8 Biology - Reaching the Age of Adolescence (Worksheet)
Fill in the blanks with suitable words.
1. The period of life, when the body undergoes certain noticeable changes, leading to reproductive maturity is called __________.
2 _______ is the start of the time when a boy is biologically ready to become a father and a girl is ready to become a mother.
3. ______ are thread-like structures in the nucleus carrying genetic information.
4. During childhood, girls and boys are similar in height. During puberty, both sexes rapidly become taller. But on average, boys usually end up ______ adults than girls.
5. During puberty the reproductive or _______ cycle begins in girls while reproductive organs in the male body begin to develop sperm cells.
6. _______ sexual characters are those features that help to distinguish the male from the female.
7. The change at puberty is controlled by _______.
8. ________ glands are a group of specialized cells that produce and secrete hormones. They are ______ glands that release their secretions directly into the blood.
9. _____ gland that releases their secretions with the help of ducts at the specific site. e.g. Salivary gland
Directions: Identify the glands in the following.
10. Master gland of body: __________
11. Thyroxine: __________
12. Insulin: ________
13. Testosterone: ___________
14. Oestrogen: __________
15. Adam's apple is prominent in __________.
16. Pimples appear mostly in puberty, it is due to increased activity of sweat and ________ glands.
17. The first menstrual flow begins at puberty, it is called ________. At age of 45 - 50 years, this reproductive cycle stops and is termed as ________.
18. Follicle-stimulating hormone (FSH) is a hormone associated with reproduction and the development of eggs in women and sperm in men. This hormone is made by the _____ gland.
19. Which hormone is often called as fight or flight hormone? ____
20. The enlargement of the thyroid gland due to the deficiency of iodine in the blood causes a disease called _______.
Answers:
1. adolescence
2. Puberty
3. Chromosomes
4. taller
5. menstrual
6. Secondary
7. hormones
8. Endocrine, ductless
9. Exocrine
10. Pituitary
11. Thyroid gland
12. Pancreas
13. Testes
14. Ovaries
15. boys
16. sebaceous
17. menarche, menopause
18. pituitary
19. Adrenaline
20. goitre
Ch 10 - Reaching Age of Adolescence (MCQs)
Ch 10 - Reaching the Age of Adolescence (Q & A-2)
Ch 10 - Reaching the Age of Adolescence (Worksheet)
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