________ causes the changes in the appearance seen in boys at the time of puberty.

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RRC Group D Previous Paper 59 (Held On: 31 Oct 2018 Shift 2)
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  1. Prolactin
  2. Adrenaline
  3. Estrogen
  4. Testosterone

Answer (Detailed Solution Below)

Option 4 : Testosterone
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Detailed Solution

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The correct answer is Testosterone.

  • Testosterone causes changes in the appearance seen in boys at the time of puberty.
  • Puberty is the process of physical changes through which a child's body matures into an adult body capable of sexual reproduction.

Key Points

  • For guys, these hormones travel through the blood and give the testes the signal to begin the production of testosterone and sperm.
  • Testosterone is the hormone that causes most of the changes in a guy's body during puberty.
  • Sex hormones are chemical substances produced by sex organs.
    • For example, Testosterone is the male sex hormone produced by the testis, and estrogen is the female sex hormone produced by the ovary. These hormones affect the sexual features of an organism.

 

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Additional Information

  • Functions of sex hormones:
    • Testosterone: This hormone brings about secondary sex characters in boys such as the growth of a beard, the voice becoming hoarse, development of reproductive organs, etc.
    • Oestrogen: This hormone is responsible for the development of secondary sexual characters in females such as the enlargement of breasts, development of female reproductive organs, etc.

Important Points 

Name Details
Prolactin
  • Prolactin, also known as lactotroph, is a protein best known for its role in enabling mammals, usually females, to produce milk.
  • It is influential in over 300 separate processes in various vertebrates, including humans.
Adrenaline
  • Adrenaline, also known as epinephrine, is a hormone and medication which is involved in regulating visceral functions.
  • Adrenaline is normally produced both by the adrenal glands and by a small number of neurons in the medulla oblongata.
Estrogen
  • Estrogen is a kind of hormone that has an important role in the health of women.
  • There are 3 types of estrogen: estrone, estradiol, and estriol.
  • They affect the sexual and reproductive development in girls and women. The ovaries make most of the estrogen in your body.
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