NCERT Solutions for Class 8 Science Chapter 10
Important NCERT Questions
8th Chapter 10 Reaching the Age of Adolescence
NCERT Books for Session 2022-2023
CBSE Board and State Board
Questions No: 6
What are sex hormones? Why are they named so? State their function.
Share
Hormones which constitute the secondary sexual characters are called sex hormones. In general, hormones work instantly when they released in blood stream. Sex hormones are different because they start to work later on. They gradually prepare in the body for reproduction.
The sex hormones are responsible for the fundamental change in growth & development and stimulate the developments of secondary sexual characters. The testes and the ovaries are the reproductive Organs and both are stimulated by the pituitary hormone during Puberty. That’s the reason these are called sex hormones.
Functions of Sex Hormones:
• In male, the testes produces the male sex hormone testosterone. This hormone helps in the development and maintenance of the primary and secondary sexual characters and production of sperms.
• In female, the ovaries secrete oestrogen and progesterone responsible for the primary and secondary sexual characters.
Sex hormones are specialized substances produced primarily by the gonads (testes in males and ovaries in females), as well as the adrenal glands. They’re named “sex hormones” due to their pivotal role in controlling sexual development and reproduction.
Function of Sex Hormones:
1. In Males (Androgens – Testosterone):
– Development: Stimulate the growth of male sexual characteristics like facial hair, deep voice, and muscle mass.
– Sperm Production: Facilitate the production of sperm cells.
– Sex Drive: Influence libido and sexual function.
2. In Females (Estrogens – Estradiol, Progesterone):
– Development: Promote the growth of female sexual traits such as breast development and regulation of the menstrual cycle.
– Reproductive Cycle: Regulate the menstrual cycle and ovulation.
– Pregnancy Support: Maintain the uterine lining and aid fetal development during pregnancy.
These hormones are vital for reproductive health, influencing the physical and functional aspects of sexual characteristics and ensuring the proper functioning of the reproductive system in both males and females.