The reproduction and endocrine system chapter discusses all the stages of life. Like what happens when the body gets matured?
Meaning of Adolescence:
Adolescence is the period of life transition when the body suffers many changes, leading to reproductive maturity.
- WHO defines the adolescence period.
- And this period lies between 11-19 years old.
- The human body suffers from many changes.
- Such changes lead to the action of puberty.
What is puberty?
We can say that puberty is a phase:
- When the reproductive organs work actively.
- The stage gets ended when the adolescent attains maturity.
What are the changes during puberty?
Many changes happen at the time of puberty. LIKE:
- Voice get change
- Height get change
- Emotional aspects
- Mental development
- Body shape get change
Hormones:
- Male hormones: Hormones in males are known as 'testosterone.'
- Female hormones: Hormones for females are known as 'estrogen.'
Zygote:
The zygote is formed with both sperm and fuse. Well, the sex chromosomes of sperm help in doing the determination of the kids' gender.
- There are 23 chromosomes in a human cell.
- Chromosomes pair form 'sex chromosomes.'
- Male chromosomes: XY
- Female chromosomes: XX
Reproduction and Endocrine System Sample Questions for Class 8
Question 1
Binary fission is seen in ________.
A. Amoeba
B. Hydra
C. Spirogyra
D. Yeast
Question 2
Which hormone is responsible for reproduction in female body?
A. Testosterone
B. Oestrogen
C. Thyroxine
D. Adrenalin
Question 3
Which of the following is duct gland?
A. Thyroid gland
B. Sebaceous gland
C. Ovary
D. Pituitary gland
Question 4
Which of the following is an example of exocrine gland?
A. Adrenaline
B. Testes
C. Salivary
D. Thyroid
Question 5
The maximum height in both girls and boys can ve acheived by the age of ________.
A. 19 - 20 years
B. 15 -16 years
C. 17 - 18 years
D. 18 -19 years