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Reaching the age of adolescence

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  • Reproductive age in women starts when their (i) menstruation starts. (ii) breasts start developing. (iii) body weight increases. (iv) height increases. (v) All of these
    Reproductive age in women starts when their menstruation starts
  • The following table shows data regarding height increase in boys and girls. What conclusions can you draw from this?
    Generally, boys are taller than girls, But during puberty, girls increase height at a greater rate.
  • Shedding off of the lining of uterus along with blood vessels is called as __________.
    Menstruation. It occurs in about 28 to 30 days. It occurs if fertilization does not occur.
  • Puberty is all about physical changes in both male and female. True or false?
    False. Because mental changes also occur during puberty. Adolescents become more mature, intellectual, emotional and independent.
  • Q. Which of the following is not a secondary sexual character in girls? a) Broadening of shoulders b) Broadening of waist c) Change in voice d) Growth of pubic hair (v) All of these
    Broadening of Shoulders. As broadening of shoulders is a secondary sexual character in males.
  • Name the male hormone and which gland secretes it?
    Testosterone, the male hormone, is secreted by testis. It stimulates the development of reproductive parts and secondary sexual characters in males.
  • Diabetes is caused by the deficiency of __________. This hormone is release by _______.
    Diabetes is caused by the deficiency of insulin. This hormone is release by pancreas.
  • What is shown in the given picture? What is the reason behind it?
    It is a pimple. It appears during puberty due to the increased activity of sweat and sebaceous glands.
  • Define puberty.
    Puberty is the age when a child's body begins to develop and change as they become an adult.
  • Chips and packed or tinned snacks are very tasty and have adequate nutritional value, so we should eat it more. True or false?
    False. Chips and packed or tinned snacks, though very tasty should never replace regular meals as they do not have adequate nutritional value.
  • A girl should not be allowed to work in the kitchen during menstruation. MYTH or FACT?
    Myth. A girl can enter and work in the kitchen during menstruation.
  • Q. Which one of the following is not an endocrine gland? A) Ovary B) Sweat gland C) Pituitary gland D) Testis (v) All of these
    Sweat Gland
  • If a sperm containing X chromosome fuses with an ovum containing X chromosome, what will be the sex of the baby. Who determined the sex of the baby-father or mother?
    The baby will be a female. The father is responsible for the sex of the baby as ovum contains X chromosome while sperm contain either X or Y chromosome.
  • Which gland is called as the master gland.
    Pituitary gland is called the master gland because it controls the functions of other glands. It also releases growth hormone.
  • A person had a very big and bulging throat. What was that and why did it happen?
    It is a disease named goitre which occurs due to the deficiency of thyroxine hormone. Thyroxine hormone is released by thyroid gland.
  • Which hormone maintains the correct salt balance in blood?
    Adrenaline.
  • We should stay away from a person infected with HIV. Cool or not cool?
    Not cool. As HIV only spreads through sharing syringe, mother's milk or sexual contact with another infected person.
  • The cycle of shedding of lining of uterus stops at the age of 45 to 50 years. This stoppage is termed as ____________
    Menopause. It occurs as levels of female hormone decreases with age. Due to which, ovaries stop releasing eggs and also uterus lining does not get thickened.
  • What is the reason behind the change in voice in males?
    In males, larynx starts to enlarge and forms a protruding part at the throat region also called Adam's apple. Due to which, voice deepens in males.
  • ____________ is also called as the female hormone.
    Estrogen is the hormone produced in female that is produced by ovaries which helps in the development of secondary sexual characters in females.
  • How many chromosome are present in human cell? How many of them are sex chromosomes.
    23 pairs or 46 chromosomes are present in human cell out of which 1 pair or 2 chromosomes are sex chromosomes.
  • Which hormone controls the metamorphosis in a frog?
    Thyroxine hormone released by thyroid gland controls the metamorphosis in a frog.
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