Question

Which is the hormone that brings about changes in girls during puberty?
A. Estrogen
B. Progesterone
C. Testosterone
D. Thyroxine

Answer 1

Hint: High levels of this may put you at higher risk of blood clots and stroke. The dominance of this hormone can also enhance our possibility of thyroid dysfunction. This may result in symptoms like fatigue and variation in weight.

Complete answer:
The activation for puberty in both boys and girls is done by the formation of 'gonadotropin releasing hormone' (GnRH) from a portion of the brain known as the hypothalamus. This hormone prompts the pituitary gland to secrete two hormones like Luteinizing Hormone (LH) and Follicle Stimulating Hormone (FSH). These hormones transport via the blood to the testicles and ovaries and activate the growth processes that will result in sexual maturity.

Now, let us find the solution from the option.
- Estrogen called as a female sex hormone which is generated mostly in the ovaries. During the activation of puberty, estrogen performs a role in the growth of secondary sexual features.
- Progesterone makes the endometrium for the probability of pregnancy after ovulation. It activates the bound to thicken to take a fertilized egg. It does not cause any change during puberty.
- Testosterone is a hormone produced by the human body. It's mainly produced in men by the testicles not in the female body.
- Thyroxine is a hormone the thyroid gland secretes into the bloodstream. Once in the bloodstream, thyroxine travels to the organs, like the kidneys and liver, where it is converted to its active form of triiodothyronine. It is not related to puberty.

Thus, the correct option is A. i.e. Estrogen.

Note: Estrogen hormone functions in maturity and control of sex organs, development of female secondary sexual features and starting of the menstrual cycle. It also processes the menstrual cycle, to maintain the development of the uterine arrangement during the first portion of the cycle. In females, it assists development and maintains both the reproductive functioning and female features, like pubic hair and breasts.